| α-addition (alpha-addition) |
|
α- (β-, γ-) ray spectrometer |
| α (alpha), β (beta) |
| α-cleavage (alpha-cleavage) |
| α-decay (alpha-decay) |
| α-effect |
| α-elimination |
| α-expulsion in photochemistry |
| α-oxo carbenes |
| α-particle (alpha-particle) |
| A-factor |
' ' value |
| ab initio calculationssuperseded |
| abatement in atmospheric chemistry |
| abeo- |
| abiological |
| abiotic |
| abiotic transformation |
| absolute activation analysis |
absolute activity,  quantity |
| absolute configuration |
| absolute counting in radioanalytical chemistry |
| absolute electrode potential |
| absolute full energy peak efficiency |
absolute lethal concentration ( )quantity |
absolute lethal dose ( )quantity |
| absolute photopeak efficiency |
| absolute preconcentration in trace analysis |
absorbance,  quantity |
| absorbance matching in spectrochemical analysis |
| absorbed dose of a substance |
absorbed dose,  of radiation |
| absorbed electron coefficient
in in situ microanalysis |
| absorbed electrons in in situ microanalysis |
| absorber |
absorptance,  quantity |
| absorption |
| absorption coefficient |
| absorption coefficient in biology |
absorption cross-section,  quantity |
| absorption factor |
| absorption intensity |
| absorption line |
| absorption pathlength of a sample cell |
| absorption spectrum |
| absorptivity |
| abstraction |
| abstraction process in catalysis |
| abundance sensitivity in mass spectrometry |
| ac |
accelerating voltage (high voltage,  ) scan
in mass spectrometry |
acceleration,  quantity |
| acceleration energy in in situ microanalysis |
acceleration of free fall,  quantity |
| accelerator in solvent extraction |
acceptable daily intake ( ) (1993, 65, 2008)quantityreplaced |
acceptable daily intake ( ) (2004, 76, 1036)quantity |
acceptor number ( )quantity |
| accommodation coefficient |
| accretion in atmospheric chemistry |
| accuracy of a measuring instrument |
| accuracy of measurement |
| acenes |
| acetals |
| acetogenins |
| acetonides |
| acetylene black |
| acetylenes |
| acetylides |
| Acheson graphite |
| achiral |
| achirotopic |
| acid |
| acid anhydrides |
| acid-labile sulfur |
| acid–base indicator |
| acid–base titration |
| acid deposition in atmospheric chemistry |
| acidimetric titration |
| acidity |
| acidity constant |
| acidity function |
| acidosis |
| acid rain in atmospheric chemistry |
| acid thioanhydrides |
| aci-nitro compounds |
actinic flux  quantity |
| actinometer |
| action spectrum |
| activated adsorption process |
| activated carbon |
| activated charcoal |
| activated complex |
| activation |
| activation in electrochemical corrosion |
| activation in radiochemistry |
| activation analysis (nuclear) |
| activation cross-section |
| activation energy (Arrhenius activation energy)quantity |
| activation reaction |
| activator |
| active centre |
| active medium |
| active metal in electrochemical corrosion |
| active site in heterogeneous catalysis |
| active solid |
| active species |
| active state in electrochemical corrosion |
| active transport in biology |
| activity |
activity,  of a radioactive materialquantity |
activity (relative activity),  quantity |
activity coefficient,  ,  quantity |
| acute toxicity |
| acylals |
| acyl anions |
| acyl carbenes |
| acyl cations |
| acyl groups |
| acyl halides |
| acylium ions |
| acyloins |
| acyloxyl radicals |
| acyl radicals |
| acyl species |
| added hydrogen |
| addend |
| addition |
| addition reaction |
| additive |
| additive name |
| additivity of mass spectra |
| additivity principle |
| adduct |
| adduct ion in mass spectrometry |
| adhesional wetting |
| adiabatic |
| adiabatic electron transfer |
| adiabatic ionization in mass spectrometry |
| adiabatic lapse rate in atmospheric chemistry |
| adiabatic photoreaction |
| adiabatic transition-state theory |
| adiabatic treatments of reaction rates |
| adjacent re-entry model in polymer crystals |
| adjusted retention volume in chromatography |
| adjuvant |
| ADMR |
| adsorbate |
| adsorbent |
| adsorber |
| adsorption |
| adsorption capacity |
| adsorption chromatography |
| adsorption complex |
| adsorption current |
| adsorption hysteresis |
| adsorption indicator |
| adsorption isobar |
| adsorption isostere |
| adsorption isothermsuperseded |
| adsorption isotherm in chromatography |
| adsorptive |
| advancement |
| advection in atmospheric chemistry |
| adverse effect |
| aeration in atmospheric chemistry |
| aerobe |
| aerobic |
| aerobic conditions |
| aerogel |
| aeromete in atmospheric chemistry |
| aerometric measurement in atmospheric chemistry |
| aerosol |
| affinity chromatography |
affinity of reaction,  quantity |
| after mass analysis in mass spectrometry |
| ageing of precipitate |
| agglomerate in catalysis |
| agglomeration |
| agglutination |
| aggregate in catalysis |
| aging (ageing) of a polymer |
| aglycon (aglycone) |
| agonist |
| agostic |
| agranular carbon |
| air contaminant in atmospheric chemistry |
| air-lift bioreactor |
| air mass in atmospheric chemistry |
| air monitoring station in atmospheric chemistry |
| air pollutant |
| air pollution |
| air pollution index (air quality index) |
| air pollution survey in atmospheric chemistry |
| air quality characteristic
in atmospheric chemistry |
| air resource management in atmospheric chemistry |
| air sampling network in atmospheric chemistry |
| Aitken particles |
| albedo |
| albumin |
| alcoholates |
| alcohols |
| alcoholysis |
| aldaric acids |
| aldazines |
| aldehydes |
| aldimines |
| alditols |
| aldoketoses |
| aldonic acids |
| aldoses |
| aldoximes |
| alert levels in atmospheric chemistry |
| alicyclic compounds |
| aliphatic compounds |
| aliquot in analytical chemistry |
| alkalimetric titration |
| alkaloids |
| alkalosis |
| alkanes |
| alkanium ions |
| alkenes |
| alkoxides |
| alkoxyamines |
| alkylenes |
| alkyl groups |
| alkylideneamino carbenes |
| alkylideneaminoxyl radicals |
| alkylideneaminyl radicals |
| alkylidene groups |
| alkylidenes |
| alkylidynes |
| alkyl radicals |
| alkynes |
| allele |
| allenes |
| allo- in amino-acid nomenclature |
| allometric |
| allosteric enzymes |
| allostery |
| allotriomorphic transition |
| allotropes |
| allotropic transition |
| allylic groups |
| allylic intermediates |
| allylic substitution reaction |
| alternant |
| alternating copolymer |
| alternating copolymerization |
| alternating current |
| alternating voltage |
| altocumulus cloud in atmospheric chemistry |
| altostratus cloud in atmospheric chemistry |
| ambident |
| ambient air in atmospheric chemistry |
| ambient air quality in atmospheric chemistry |
| ambo |
| Ames/salmonella test |
| amic acids |
| amide hydrazones |
| amide oximes |
| amides |
| amidines |
| amidium ions |
| amidrazones |
| aminals |
| amine imides |
| amine imines |
| amine oxides |
| amines |
| amine ylides |
| aminimides |
| aminium ions |
| aminiumyl radical ions |
| amino-acid residue in a polypeptide |
| aminonitrenes |
| aminooxyl radicals |
| amino radicals |
| amino sugars |
| aminoxides |
| aminoxyl radicals |
| aminylenes |
| aminylium ions |
| aminyl oxides |
| aminyl radicals |
| ammonium compounds |
| ammonium imines |
| ammonium ylides |
| ammoniumyl radical ions |
| amorphous carbon |
amount concentration,  quantity |
amount fraction,  ( for gaseous mixtures)quantity |
amount of substance,  quantity |
| amount-of-substance concentration |
amount-of-substance fraction,  |
| ampereunit |
| amperometric detection method
in electrochemical analysis |
| amphipathic |
| amphiphilic |
| amphiprotic (solvent) |
| ampholytes |
| amphoteric |
| amplification reaction |
| amplitude of alternating current |
| amplitude of alternating voltage |
| AM (0) sunlight |
| AM (1) sunlight |
| anabolism |
| anaerobe |
| anaerobic |
| anaesthetic |
| analgesic |
| analogue metabolism |
| analogue to digital converter (pulse) |
| analyte |
| analytical function |
| analytical instrument |
| analytical intercomparison |
| analytical portion |
| analytical pyrolysis |
| analytical quality control |
| analytical radiochemistry |
| analytical sample |
| analytical solution |
| analytical solution calorimetry |
| analytical unit (analyser) |
| anation |
| anchimeric assistance |
| aneroid barometer |
| Anger camera |
| anglequantity |
| angle of observation |
angle of optical rotation,  quantity |
| angle strain |
|
ångström
unit |
| angular distribution |
angular frequency,  quantity |
angular momentum,  quantity |
| anhydrides |
| anhydro bases |
| anilides |
| anils |
| anion |
| anion exchange |
| anion exchanger |
| anionic polymerization |
| anionotropic rearrangement (or anionotropy) |
| anion radical |
| anisometric |
| anisotropy |
| annelation |
| annihilation |
| annulation |
| annulenes |
| annulenylidenes |
| anode |
| anodic transfer coefficient |
| anomeric effect |
| anomers |
| ansa compounds |
| antagonism |
| antagonist |
| antarafacial |
| anthelmint(h)ic |
| anthocyanidins |
| anthocyanins |
| anti |
| antiaromatic compounds |
| antibiotic |
| antibody |
| anticholinergic |
| anticircular elution (anticircular development)
in planar chromatography |
| anticlinal |
| anticlined structures in polymers |
| anticodon |
| anti-Compton γ-ray spectrometer |
| anticyclone in atmospheric chemistry |
| antiferroelectric transition |
| antiferromagnetic transition |
| antigen |
| anti-Hammond effect |
| antihelminth |
| anti-Markownikoff addition |
| antimetabolite |
| antimony–xenon lamp (arc) |
| antimycotic |
| antiparticle |
| antiperiplanar |
| antipodes |
| antiprismo- |
| antiresistant |
| antiserum |
| anti-Stokes shift |
| anti-Stokes type radiation (fluorescence) |
| anti-thixotropy |
| ap |
| apex |
| apex current |
| apex potential |
| aphicide |
| apical (basal, equatorial) |
| apo- in carotenoid nomenclature |
| apoenzyme |
| apoprotein |
| apoptosis |
| apparent (quantity) |
| apparent lifetime |
| apparent viscosity of a liquid |
| appearance energy (appearance potential) |
| appearance potential |
appearance temperature,
in electrothermal atomization |
| applied potential |
| aprotic (solvent) |
| aquation |
| arachno- |
| Archibald's method |
| area of an electrode-solution interface |
| area of interface |
| area viscosity |
| areic |
| arene epoxides |
| arene oxides |
| arenes |
| arenium ions |
| arenols |
| arenonium ions |
| argon ion laser |
| arithmetic mean (average) |
| aromatic |
| aromaticity |
| arrester in atmospheric chemistry |
Arrhenius  factor |
| Arrhenius energy of activation |
| Arrhenius equation |
| arsanes |
| arsanylidenes |
| arsanylium ions |
| arsenides |
| arsine oxides |
| arsines |
| arsinic acids |
| arsinidenes |
| arsinous acids |
| arsonic acids |
| arsonium compounds |
| arsonous acids |
| arsoranes |
| artificial graphite |
| artificial neural networks |
| artificial radioactivity |
| aryl cations |
| arylene groups |
| aryl groups |
| aryne |
| ascending elution (ascending development)
in planar
chromatography |
| ash in atmospheric chemistry |
| ashing in analysis |
| aspirator |
| assay |
| assay kit |
| association |
| association reaction (associative combination)
in mass
spectrometry |
| associative desorption |
| associative ionization in mass spectrometry |
| associative surface reaction |
| asym- |
| asymmetric |
| asymmetric carbon atom |
| asymmetric centre |
| asymmetric destruction |
| asymmetric film |
| asymmetric induction |
| asymmetric membrane |
| asymmetric synthesis |
| asymmetric transformation |
| asymmetry |
| asymmetry potential of a glass electrode |
| atactic macromolecule |
| atactic polymer |
| atmosphereunit |
| atmosphere of the earth |
| atmospheric pressure ionization
in mass spectrometry |
| atom |
| atomic fluorescence |
| atomic laser |
atomic mass  quantity |
| atomic mass constantconstant |
| atomic mass unit |
atomic number (proton number),  quantity |
atomic orbital,  ,  ,  |
| atomic ring-sector |
| atomic spectral lines |
| atomic symbol |
| atomic units |
| atomic weight |
| atomization in analytical flame spectroscopy |
atomization surface temperature, 
in electrothermal atomization |
| atomize |
| atomizer in analytical flame spectroscopy |
| atom–molecule complex mechanism |
| atropisomers |
| attachment |
attenuance,  quantity |
| attenuance filter |
| attenuation |
| attenuation coefficient |
| attoSI unit prefix |
| attractive–mixed–repulsive
(AMR) classification |
| attractive potential-energy surface |
| attributable risk |
| Auger effect |
| Auger electron |
| Auger electron spectroscopy |
| Auger electron yield |
| Auger yield |
| autacoid |
| autocatalytic reaction |
| auto-ionization in mass spectrometry |
| automation in analysis |
| automerization |
| autophobicity |
| autopoisoning in catalysis |
| autoprotolysis |
| autoprotolysis constant |
| autoradiograph |
| autoradiolysis |
| auxiliary electrode |
| auxochrome |
| auxotrophy |
| avalanche photodiode |
| average current density |
| average degree of polymerization |
| average life in nuclear chemistry |
| average rate of flow in polarography |
| Avogadro constantconstant |
| avoided crossing of potential-energy surfaces |
| Avrami equation |
| axial (equatorial) |
| axial chirality |
| axialite in polymer crystals |
| axis of chirality |
| axis of helicity |
| azacarbenes |
| azamines |
| azanes |
| azenes |
| azides |
| azimines |
| azines |
| azinic acids |
| azlactones |
| azo compounds |
| azo imides |
| azomethine imides |
| azomethine oxides |
| azomethines |
| azomethine ylides |
| azonic acids |
| azoxy compounds |
| azo ylides |
| azylenes |
| β (beta) |
| β-cleavage in mass spectrometry |
| β-decay |
| β-particle |
| backbone |
| back electron transfer |
| back extraction |
| backflush |
| background of a radiation measuring device |
| background concentration (level)
in atmospheric chemistry |
| background mass spectrum |
| background radiation |
| backscatter |
| back scatter coefficient in in situ microanalysis |
| back scattered electrons
(BSEs)
in in situ microanalysis |
| backscattering spectroscopy |
| back washing |
| Baeyer strain |
| baffle chamber in atmospheric chemistry |
| bag filter in atmospheric chemistry |
| baghouse in atmospheric chemistry |
| Bainite transition |
| baking in carbon chemistry |
| Baldwin's rules |
bandgap energy  quantity |
| bandpass filter |
| band spectra |
| barunit |
| barbiturates |
| barnunit |
| Barton reaction |
| basal |
| base |
| base electrolyte |
| base kind of quantity |
| baseline in chromatography |
| baseline concentration in atmospheric chemistry |
| baseline error in spectrochemical analysis |
| base pairing |
| base peak in mass spectrometry |
| base quantity |
| base unit of measurement |
| basicity |
| basicity function |
| batch in analytical chemistry |
| batch injection calorimetry |
| batch operation in analysis |
| batch reactor |
| Bates–Guggenheim convention |
| bathochromic shift (effect) |
| bead-rod model |
| bead-spring model |
| beam current in in situ microanalysis |
| beam diameter in in situ microanalysis |
| beam-gas experiments |
| becquerelunit |
| bed volume in chromatography |
| Beer–Lambert law (or Beer–Lambert–Bouguer law) |
| before mass analysis in mass spectrometry |
| Bell–Evans–Polanyi principle |
benchmark dose ( ) and lower effective dose ( )quantity |
| bending of energy bands |
| benzenium ions |
| benzenonium ions |
| benzylic groups |
| benzylic intermediates |
| benzynes |
| Berry pseudorotation |
| betaines |
| betweenanenes |
| bias |
| biased linear pulse amplifier |
| bias error |
| bifunctional catalysis |
| bilayer |
| bimodal distribution |
| bimolecular |
| binder |
| binder in chromatography |
| binder coke |
| binding site |
| Bingham flow |
| bioassay |
| bioavailability (general) |
| bioavailabilty in pharmacokinetics |
| biocatalyst |
biochemical (biological) oxygen demand ( )quantity |
| biochip |
| bioconjugate |
| bioconversion |
| biodegradation |
| bioelectronics |
| bioisostere |
| biological effect monitoring |
biological exposure index ( )quantity |
| biological half life |
| biological monitoring |
| biological tolerance values for working materials (Biologische Arbeitsstoff Toleranz Werte (BAT))quantity |
| bioluminescence |
| biomarker (2004, 76, 1042) |
| biomarker (2001, 73, 1022) |
| biomass |
| biomimetic |
| biopolymers |
| bioreactor |
| biosensor |
| biosphere in atmospheric chemistry |
| biosynthesis |
| biotechnology |
| biotransformation |
| biphotonic excitation |
| biphotonic process |
| bipolymer |
| biradical |
| biradicaloid |
| bisecting conformation (eclipsing conformation) |
| bismuthanes |
| bismuthines |
| bisphenols |
| bivane in atmospheric chemistry |
| black film |
| blank value in analysis |
| blaze-angle in spectrochemical analysis |
| bleaching in photochemistry |
| block |
| block copolymer |
| block macromolecule |
| block polymer |
| blotting in biotechnology |
| blowdown in atmospheric chemistry |
| blue shift |
| boat |
| Bodenstein approximation |
| body burden |
| bohrunit |
| Bohr magnetonconstant |
| Bohr radiusconstant |
| bolometer |
| Boltzmann constantconstant |
| bomb-digestion in spectrochemical analysis |
| bond |
| bond dissociation |
bond-dissociation energy,  quantity |
| bonded phase in chromatography |
| bond energy (mean bond energy) |
| bond-energy-bond-order method |
| bonding number |
| bond migration |
| bond number |
| bond opposition strain |
bond order  |
| bond ring-sector |
| boranes |
| boranylidenes |
| borderline mechanism |
| borenes |
| borinic acids |
| boronic acids |
| borylenes |
| boson |
| boundary layer in atmospheric chemistry |
| bound fraction in radioanalytical chemistry |
| bowsprit (flagpole) |
| branch (side chain, pendant chain) in polymers |
| branched chain in polymers |
| branched polymer in polymers |
| branching chain reaction |
| branching decay |
| branching fraction |
| branching index in polymers |
| branching ratio |
| branch point in polymers |
| branch unit in polymers |
| break of a foam |
| break of an emulsion |
| Bredt's rule |
| breeching in atmospheric chemistry |
| breeze in atmospheric chemistry |
| Bremsstrahlung |
| bridge |
| bridged carbocation |
| bridgehead |
| bridge index |
| bridge solution in pH measurement |
| bridging ligand |
| bromohydrins |
| bromonium ions |
| Brønsted acid |
| Brønsted base |
| Brønsted relation |
| Brooks and Taylor structure |
| Brownian motion |
| brush macromolecule |
| bubble column |
| bubbler in atmospheric chemistry |
| buffer-addition technique
in analytical flame
spectroscopy |
| bulk concentration in electroanalysis |
| bulk mesophase |
| bulk rheology |
| bulk sample |
| bulk strain |
| Bunnett–Olsen equations |
| Bunsen burner |
| Bunte salts |
| burning tension of an electrical arc |
burning velocity, 
of a flame front in flame emission and absorption spectrometry |
| burn-up |
| burn-up fraction |
| bypass injector in gas chromatography |
| χ-parameter |
| cadium–helium laser |
| cage |
| cage compound |
| cage effect |
| Cahn–Ingold–Prelog system |
| calcination |
| calcined coke |
| calibration in analysis |
| calibration component |
| calibration curve |
| calibration function in analysis |
| calibration gas mixture in atmospheric chemistry |
| calibration material in analysis |
| calibration mixture in analysis |
| calibration sample in analysis |
| calixarenes |
| calorieunit |
| calorimetric titration |
| calorimetry |
| candelaunit |
| canonical form |
| canonical rate constant |
| canonical variational transition-state theory
(CVTST)
|
capacitance,  of a plate capacitorquantity |
| capacitance hygrometer |
| capillary column in chromatography |
| capillary condensation |
| captodative effect |
| capture |
| capture cross-section |
| capture γ-radiation |
| carbaboranes |
| carbamates |
| carbanion |
| carbena |
| carbenes |
| carbene analogues |
| carbene metal complexes |
| carbene radical anions |
| carbene radical cations |
| carbenium centre |
| carbenium ion |
| carbenoids |
| carbinolamines |
| carbinols |
| carbinyl cations |
| carbocation |
| carbocyclic compounds |
| carbodiimides |
| carbohydrates |
| carbon |
| carbon loading of the packing material in liquid chromatography |
| carbonaceous mesophase |
| carbon artifact |
| carbon black |
| carbon–carbon composite |
| carbon cenospheres |
| carbon cloth |
| carbon dioxide laser (CO2
laser) |
| carbon electrode |
| carbon felt |
| carbon fibre |
| carbon fibre fabrics |
| carbon fibres type HM
|
| carbon fibres type HT |
| carbon fibres type IM |
| carbon fibres type LM |
| carbon fibres type UHM |
| carbonitriles |
| carbonium ion |
| carbonization |
| carbon material |
| carbon mix |
| carbon whiskers |
| carbonyl compounds |
| carbonyl imides |
| carbonyl imines |
| carbonyl oxides |
| carbonyl ylides |
| carboranes |
| carboxamides |
| carboxamidines |
| carboxylic acids |
| carbylamines |
| carbynes |
| carbyne metal complexes |
| carbynium ions |
| carotenes |
| carotenoids |
| carrier |
| carrier protein |
| carrier in radioanalytical chemistry |
| carrier atom in organic reaction mechanisms |
| carrier-free |
| carrier gas |
| carry-over |
| carry-over effect |
| cascade impactor |
| catabolism |
| catabolite repression |
| catalase |
| catalymetric titration |
catalysed rate of reaction,  |
| catalysis |
| catalysis law |
| catalyst |
| catalyst in solvent extraction |
| catalyst ageing |
| catalyst deactivation |
| catalyst decay |
catalytic activity,  of an enzyme |
catalytic activity concentration,  |
catalytic activity content,  |
| catalytic activity fraction of an isozyme |
| catalytic coefficient |
| catalytic concentration |
| catalytic content |
| catalytic cracking |
| catalytic current |
| catalytic current, limiting |
| catalytic dehydrocyclization |
| catalytic domain of a polypeptide |
| catalytic fraction |
| catalytic graphitization |
| catalytic hydrocracking |
| catalytic hydrodesulfurization |
| catalytic hydrogenolysis |
| catalytic methanation |
| catalytic reforming |
| catalytic thermometric titration |
| cataphoresis |
| catecholamines |
| catena- |
| catenanes (catena compounds) |
| cathode |
cathodic transfer coefficient,  quantity |
| cation |
| cation exchange |
| cation exchanger |
| cationic polymerization |
| cationotropic rearrangement |
| cationotropy |
| cation radical |
| cavitands |
| cavity dumping in photochemistry |
| cDNA |
ceiling value ( )quantity |
| ceilometer in atmospheric chemistry |
| cell constant of a conductivity cell |
| cell error in spectrochemical analysis |
| cell line |
Celsius temperature,  ,  quantity |
| centiSI unit prefix |
| central atom |
| centre of a Mossbauer spectrum |
| centre of chirality |
centrifugal (centripetal) acceleration,  quantity |
| centrifugal barrier |
| centrifugal flow |
centrifugal force,  quantity |
centrifugal radius,  quantity |
| cephalins (kephalins) |
| cephalosporins |
| cephams |
| cephems |
| ceramic filter |
| Cerenkov detector |
| Cerenkov effect |
| Cerenkov radiation |
| chain in polymers |
| chain axis of a polymer |
| chain branching |
| chain carrier |
| (chain) conformational repeating unit of a polymer |
| chain-ending step |
| chain fission yield |
| chain folding in polymer crystals |
| (chain) identity period of a polymer |
| chain initiation |
chain length,  |
| chain-orientational disorder in polymer crystals |
| chain polymerization |
| chain-propagating reaction |
| chain reaction |
| chain scission of a polymer |
| chain-termination reaction |
| chain transfer |
| chair, boat, twist |
| chair–chair interconversion |
| chalcones |
| chamber saturation in gas chromatography |
| change of a quantity |
| change ratio of a quantity |
| channel |
| channel black |
| channel photomultiplier tube |
| chaperon |
| char |
| characteristic in analytical chemistry |
| characteristic group in organic nomenclature |
| characteristic length in thin films |
characteristic mass for integrated absorbance,  in electrothermal atomizationquantity |
characteristic mass for peak absorption,  in electrothermal atomizationquantity |
characteristic mass,
in electrothermal atomizationquantity |
| characteristic potential |
| characteristic ratio in polymers |
| characteristic scale in thin films |
| characteristic X-radiation |
| characteristic X-ray emission |
| charcoal |
| charge |
charge density,  quantity |
| charge-exchange ionization in mass spectrometry |
| charge-exchange reaction |
| charge hopping |
| charge-inversion mass spectrum |
charge number,  quantity |
| charge number in inorganic nomenclature |
charge number  ,  ,
 of a cell reactionquantity |
| charge-permutation reaction |
| charge population |
| charge recombination |
| charge separation |
| charge shift |
| charge-stripping reaction |
| charge-transfer adsorption |
| charge-transfer complex |
| charge-transfer device in radiation detection |
| charge-transfer reaction in mass spectrometry |
| charge-transfer
(CT) state |
| charge-transfer step of an electrode reaction |
| charge-transfer (CT) transition |
| charge transfer transition to solvent
(CTTS) |
| charring |
| chelate |
| chelation |
| chelatometric titration |
| cheletropic reaction |
| chelotropic reaction |
| chemical actinometer |
| chemical activation |
| chemical adsorption |
| chemical amount |
| chemical decomposition |
| chemical diffusion |
| chemical dosimeter |
| chemical element |
| chemical equilibrium |
chemical flux,  quantity |
| chemical induction (coupling) |
| chemical ionization in mass spectrometry |
| chemical isotope exchange |
| chemical laser |
| chemical species |
| chemical species of an element |
| chemically induced dynamic nuclear polarization
(CIDNP)
|
| chemical measurement process (CMP) |
chemical oxygen demand ( )quantity |
chemical potential,  quantity |
| chemical reaction |
| chemical reaction equation |
| chemical relaxation |
chemical shift,  in NMRquantity |
| chemical shift in photoelectron and Auger spectra |
| chemical substance |
| chemical vapour generation
in spectrochemical analysis |
| chemical yield |
| chemiexcitation |
| chemiflux |
| chemi-ionization in mass spectrometry |
| chemiluminescence |
| chemiluminescence analyser |
| chemiluminescent methods of detection in analysis |
| chemisorption (chemical adsorption) |
| chemometrics |
| chemoselectivity (chemoselective) |
| chemospecificity |
| chemostat |
| chimney effect in atmospheric chemistry |
| chiral |
| chiral mobile phase |
| chiral selector |
| chiral stationary phase in liquid chromatography |
| chirality |
| chirality axis |
| chirality centre |
| chirality element |
| chirality plane |
| chirality sense |
| chiroptic/chiroptical |
| chirotopic |
| chloramines |
| chlorocarbons |
| chlorohydrins |
| chloronium ions |
| cholesteric phase |
| chromatogram |
| chromatograph (noun) |
| chromatograph (verb) |
| chromatographic detector |
| chromatography |
| chromophore |
| chromosome |
| chronic toxicity |
| CIDEP (Chemically Induced Dynamic Electron
Polarization)
|
| CIDNP (Chemically Induced Dynamic Nuclear
Polarization)
|
| CIEEL (Chemically Initiated Electron Exchange
Luminescence)
|
| cine-substitution |
| CIP priority |
| C. I. P. system |
| circular development |
| circular dichroism (CD) |
| circular elution |
| circular frequency |
| cis- in inorganic nomenclature |
| cis conformation in polymers |
| cis-fused |
| cisoid conformation |
| cistactic polymer |
| cis, trans |
| cis-trans isomers |
| class (a) metal ion |
| class (b) metal ion |
| class of helix in polymers |
| clathrates |
| clausiusunit |
| clean surface |
| clean up in spectrochemical analysis |
| clearance in toxicology |
clearance, 
quantity |
| clearing point |
| clinal |
| CLOGP values |
| clone |
| closed film |
| closed system in spectrochemical analysis |
| closo- |
| cloud in atmospheric chemistry |
| cluster |
| cluster analysis |
| cluster ion in mass spectrometry |
| coacervation |
| coagulation (flocculation) in colloid chemistry |
| coal-derived pitch coke |
| coalescence in colloid chemistry |
| coalification |
| coal tar pitch |
| cobalamines |
| codon |
| coefficient |
coefficient of haze ( ) in atmospheric chemistryunit |
| coenzyme |
| coextraction |
| cofactors |
coherence length,  in thin filmsquantity |
| coherent radiation |
| coherent scattering |
| coherent source in spectrochemistry |
| coherent structure |
| coherent system of units of measurement |
| coherent (derived) unit of measurement |
| coincidence circuit |
| coincidence resolving time |
| co-ions |
| coke |
| coke breeze |
| coking |
| col (saddle point) |
|
CO2
laser |
| cold neutrons |
| collection |
| collection efficiency in atmospheric chemistry |
| collection gas flow system
in spectrochemical
analysis |
| collector in atmospheric chemistry |
| collector (scavenger) |
| colligation |
| collimation |
| collimator |
| collinear reaction |
| collisional activation (collisionally activated
dissociation)
in mass spectrometry |
| collisional broadening of a spectral line |
| collisional excitation in mass spectrometry |
| collision complex |
collision cross-section,  quantity |
collision density,  quantity |
collision diameter,  quantity |
collision efficiency,  quantity |
collision frequency,  quantity |
| collision-induced dissociation
in mass
spectrometry |
| collision number |
| collision theory |
| colloid |
| colloidal |
| colloidal carbon |
| colloidal dispersion |
| colloidal electrolyte |
| colloidally stable |
| colloidal suspension |
| colloid osmotic pressure (Donnan pressure) |
| colorimeter |
| colour indicator |
| column in chromatography |
| column chromatography |
column volume,  in chromatography |
| combination electrode |
| combined sample |
| comb macromolecule |
| comb polymer |
| combustion gas |
| commensurate–incommensurate transition |
| common black film |
| common-ion effect (on rates) |
| communities (consortia, syntrophic or synergistic
associations)
|
| compact layer in electrochemistry |
| comparative molecular field analysis (CoMFA) |
| comparator in radioanalytical chemistry |
| compartmental analysis |
| compensation in catalysis |
| compensation in stereochemistry |
| compensation effect |
| competition |
| competitive binding assay |
| competitive inhibition of catalysis |
| complementary binding sites |
| complementary DNA
(cDNA) |
| complex |
| complex coacervation |
| complex mechanism |
| complex-mode reaction |
| complexometric titration |
| complex reaction |
| component |
| composite mechanism |
| composite membrane |
| composite reaction |
| composite sample |
| compositional heterogeneity of polymers |
| composition of pure air in atmospheric chemistry |
| compressibility factor |
compression factor,  quantity |
| comproportionation |
| Compton effect |
| Compton electron |
| Compton scattering |
| computational chemistry |
| computer-assisted drug design (CADD) |
| computer-assisted molecular design (CAMD) |
| computer-assisted molecular modeling (CAMM) |
| concave isotherm in chromatography |
| concentrated phase in polymer chemistry |
| concentration |
| concentration-cell corrosion |
concentration distribution ratio,
in chromatography |
| concentration factor in solvent extraction |
concentration gradient,  |
| concentration in experimental surface (or surface
concentration)
|
| concentration overpotential |
| concentration-sensitive detector in chromatography |
| concentration thermometric technique
in enthalpimetric analysis |
| concerted process |
| condensation in atmospheric chemistry |
| condensation nuclei (CN) in atmospheric chemistry |
| condensation polymerization (polycondensation) |
| condensation reaction |
| condensative chain polymerization |
| conditional (formal) potential |
| conditional rate constant of an electrode reaction |
| conditioning in solvent extraction |
conductance,  |
| conduction band |
conductivity,  ,  quantity |
| confidence level |
| confidence limits (about the mean) |
| configuration (electronic) |
| configuration (stereochemical) |
| configurational base unit in polymers |
| configurational disorder in polymers |
| configurational homosequence in polymers |
| configurational repeating unit in polymers |
| configurational sequence in polymers |
| configurational unit in polymers |
| configuration interaction (CI) |
| confined atomizer |
| conformation |
| conformational analysis |
| conformational analysis in drug design |
| conformational disorder in polymers |
| conformational repeating unit of a polymer |
| conformer |
| congener |
| conglomerate |
| congruent transition |
| coning and quartering in analytical chemistry |
| conjugate acid–base pair |
| conjugated system (conjugation) |
| conjugate solutions |
| conjugation |
| conjugation in gene technology |
| conjugation labelling in radioanalytical chemistry |
| conjugative mechanism |
| conjunctive name |
| connectivity |
| conrotatory |
| consecutive reactions |
| consecutive steps |
| consignment in analytical chemistry |
| consistency |
| consolute point |
| constituent |
| constitution |
| constitutional heterogeneity of polymers |
| constitutional homosequence |
| constitutional isomerism |
| constitutional repeating unit
(CRU) in polymers |
| constitutional sequence in polymers |
| constitutional unit |
| constitutive enzymes |
| contact anglequantity |
| contact corrosion |
| contact ion pair |
| contact potential difference (Volta potential
difference)
|
| contamination |
| content |
| continuity inversion in solvent extraction |
| continuous analyser |
| continuous bed packing in liquid chromatography |
| continuous flow |
| continuous-flow cell in spectrochemical analysis |
| continuous flow enthalpimetry |
| continuous indication analyser |
| continuously curved chain in polymers |
| continuous measuring cell |
| continuous operation in analysis |
| continuous precipitation |
| continuous transition |
| contour length in polymers |
| contributing structure |
| controlled atmosphere in atmospheric chemistry |
| control material in analysis |
| control sample in analysis |
| convection (as applied to air motion) |
| convenience sample |
| conventional transition-state theory |
| conventional true value |
| conversion electron |
| conversion spectrum |
| convex isotherm in chromatography |
| co-oligomer |
| co-oligomerization |
| cooperative transition |
| cooperativity |
| coordinate covalence |
| coordinate link |
| coordination |
| coordination entity |
| coordination number |
| coordination polyhedron (polygon) |
| coordinatively saturated complex |
| coordinatively unsaturated complex |
| copolymer |
| copolymerization |
| copolymer micelle |
| copper vapour laser |
| coprecipitation |
| copy number in biotechnology |
| core atom in organic reaction mechanisms |
| coronands (coronates) |
| corrected emission spectrum |
| corrected excitation spectrum |
| corrected retention volume in gas chromatography |
| correlation analysis |
| correlation coefficient |
| correlation diagram |
| correlation energy |
| corrinoids (cobalamines, corphyrins, corrins, vitamin B12
compounds)
|
| corrosion |
| corrosion cell |
| corrosion current |
corrosion potential,  quantity |
| corrosion rate |
| co-solvency in polymers |
| cosolvent |
| cosphere |
| cotectic |
| coulombunit |
coulomb integral,  quantity |
| coulometric detection method
in electrochemical
analysis |
| coulometric titration |
| coumarins |
| count |
| counter-current flow |
| counter-ions |
| counter tube |
| counting efficiency |
| counting loss |
| counting rate |
| coupled (indicator) reaction in analysis |
| coupled simultaneous techniques in analysis |
| coupling |
coupling constant (spin-spin),  quantity |
| covalent bond |
| covalent network |
| Cox–Yates equation |
| cracking |
| crazing |
| cream |
| creaming |
| cream volume |
| cresols |
| critical embryo |
| critical energy (threshold energy) |
critical excitation energy,
in in situ microanalysisquantity |
critical micelle concentration ( )quantity |
| critical point |
critical pressure,  quantity |
critical quenching radius,  |
| critical solution composition |
| critical solution point |
| critical solution temperature |
| critical study |
critical temperature,  quantity |
| critical thickness of a film |
| cross-conjugation |
| crossed electric and magnetic fields
in mass spectrometry |
| crossed molecular beams |
| cross-flow filtration in biotechnology |
| crossing over in biotechnology |
| crosslink |
cross-over concentration,  |
| cross reaction |
| crowding in solvent extraction |
| crown |
| crown conformation |
| crud in solvent extraction |
| cryogenic |
| cryogenic sampling |
| cryptand |
| cryptate |
| crystal diffraction spectrometer |
| crystal field |
| crystal field splitting |
| crystal laser |
| crystalline electrodes |
| crystalline polymer |
| crystallinity |
| crystallization |
| CT |
| C-terminal residue in a polypeptide |
| cumulative double bonds |
| cumulative fission yield |
| cumulative sample |
| cumulenes |
| cumulonimbus cloud in atmospheric chemistry |
| cumulus cloud in atmospheric chemistry |
| cupola |
| curieunit |
| current densityquantity |
| current density (relative local) |
| current distribution |
| current efficiency |
| current migration |
| current yield |
| Curtin–Hammett principle |
| cut off in aerosol sizes in atmospheric chemistry |
| cut-off filter |
| CVD diamond |
| CW |
| cyanates |
| cyanides |
| cyanine dyes |
| cyanogenic |
| cyanohydrins |
| cybotactic region |
| cycles per second |
| cyclic acid anhydrides (cyclic anhydrides) |
| cyclitols |
| cyclization |
| cyclo- |
| cycloaddition |
| cycloalkanes |
| cycloalkyl groups |
| cyclodepsipeptides |
| cyclodextrins |
| cycloelimination |
| cyclohexadienyl cations |
| cyclone (collector) in atmospheric chemistry |
| cyclophanes |
| cyclopolymerization |
| cycloreversion |
| cyclosilazanes |
| cyclosiloxanes |
| cyclotron |
| cytochrome P450 |
| cytochromes |
| Δ (delta), Λ (lambda) |
|
d,
l,
dl |
| d, l, dl |
| daltonunit |
| dark current |
| dark output |
| dark photochemistry (photochemistry without light) |
| dark reaction (darkness reaction) |
| dark resistance |
| Darlington phototransistor |
| data reduction |
| dative bond |
| daughter ion in mass spectrometry |
| daughter product in radiochemistry |
| Davydov splitting (factor-group splitting) |
| dayunit |
| deactivation |
| dead time in radioanalytical chemistry |
| dead time of an analyser |
| dead time correction in radioanalytical chemistry |
| dead-volume in chromatography |
| debyeunit |
| Debye–Hückel equation |
| decaSI unit prefix |
decadic absorbance,  quantity |
| decay chain |
| decay constantquantity |
| decay curve |
| decay rate in atmospheric chemistry |
| decay rate of a radioactive material |
| decay scheme in radioanalytical chemistry |
| decay time in heterogenous catalysis |
| deciSI unit prefix |
| decibelunit |
| decomposition |
| decontamination factor
in liquid-liquid distribution |
| DEDMR |
| de-electronation |
| de-energization efficiency |
| definitive method |
| deflection (for a precision balance) |
| deflocculation (peptization) |
| degeneracyquantity |
| degenerate chain branching |
| degenerate chemical reaction |
| degenerate rearrangement |
| degree of arcunit |
| degree Celsiusunit |
| degree Fahrenheitunit |
| degree of activation |
| degree of association of a micelle |
| degree of crystallinity of a polymer |
| degree of dissociation |
| degree of inhibition |
| degree of ionization |
| degree of polymerization |
degree of reaction,  quantity |
| degrees of cistacticity and transtacticity |
degrees of freedom,  |
| degrees of triad isotacticity, syndiotacticity, and
heterotacticity
|
| dehydroarenes |
| dehydrobenzenes |
| delayed coincidence |
| delayed coke |
| delayed coking process |
| delayed fluorescence |
| delayed luminescence |
| delayed neutrons |
| deliquescence |
| delocalization |
| demister |
| denaturation of a macromolecule |
| denaturation of alcohol |
| dendrite |
| denitrification |
density,  quantity |
| density inversion in solvent extraction |
density of states,  ,  |
| denticity |
| denuder system (tube or assembly) |
| deodorizer in atmospheric chemistry |
| deoxyribonucleic acids (DNA) |
| depolarization of scattered light |
| depolarizer |
| depolymerization |
| deposition in atmospheric chemistry |
| deposition velocity in atmospheric chemistry |
| depsides |
| depsipeptides |
| depth of penetration of light |
| depth profile |
| depth resolution |
| deracemization |
| derivative potentiometric titration |
| derivative spectroscopy |
| derived coherent unit |
| derived kind of quantity |
| derived non-coherent unit |
| derived quantity |
| derived unit of measurement |
| descending elution/development
in planar
chromatography |
| deshielding |
| desiccant |
| desolvation in flame spectroscopy |
| desorption |
| desorption (by displacement) |
| desulfurization |
| desymmetrization |
| desymmetrization step |
| detachment |
| detailed balancing (principle of) |
| detection efficiency
in nuclear analytical chemistry |
| detection limit |
| detection limit in analysis |
| detergent |
| detoxification |
| deuteriation |
| deuteride |
| deuterio |
| deuterium |
| deuteron |
deviation,  |
| devolatilizer |
| dew point in atmospheric chemistry |
| dew point hygrometer (cooled surface condensation) |
| Dexter (electron exchange) excitation transfer |
| dextrans |
| dextrins |
| DFDMR |
| diabatic coupling |
| diabatic electron transfer |
| diabatic photoreaction |
| diacylamines |
| diads in polymers |
| diagram level in X-ray spectroscopy |
| diagram line in X-ray spectroscopy |
| dialysate |
| dialysis |
| dialysis residue |
| diamagnetic |
| diamidides |
| diamond |
| diamond by CVD |
| diamond-like carbon films |
| dianions |
| diastereoisomer (diastereoisomeric) excess |
| diastereoisomeric units in a polymer |
| diastereoisomerization |
| diastereoisomerism |
| diastereoisomers (diastereomers) |
| diastereomeric ratio |
| diastereomers |
| diastereomorphism |
| diastereoselectivity |
| diastereotopic |
| diazanylidenes |
| diazenyl radicals |
| diazoamino compounds |
| diazoates |
| diazo compounds |
| diazonium salts |
| diazooxides |
| diazotates |
| dicarbenium ions |
| dichotomous sampler |
| dielectric constant |
dielectric polarization,  quantity |
| dienes |
| dienophile |
| difference absorption spectroscopy |
| differential capacitancequantity |
| differential detector in chromatography |
| differential diffusion coefficient |
| differential molar energy of adsorption |
| differential molar interfacial energy |
| differential molar surface excess energy |
| differential scanning calorimetry (DSC) |
| differential thermal analysis (DTA) |
| differential viscosity |
| diffraction |
| diffraction analysis |
| diffused junction semiconductor detector |
| diffuse layer in electrochemistry |
| diffuser |
| diffusion |
| diffusional transition |
| diffusion battery |
diffusion coefficient,  quantity |
| diffusion control |
| diffusion-controlled rate |
| diffusion current (or diffusion-controlled current) |
| diffusion current constant in polarography |
| diffusion layer (concentration boundary layer) |
| diffusion layer thickness |
| diffusionless transition |
| diffusion potential |
| dihedral angle |
| diisotactic polymer |
| dilatancy |
| dilational (dilatational) transition |
| dilational viscosity |
| diluent in solvent extraction |
| diluent gas |
| dilute phase in polymer chemistry |
| diluter |
| dilute solution |
dilution rate,  in biotechnologyquantity |
| dimension of a quantity |
| dimensionless quantities |
| dimeric ion in mass spectrometry |
| dimerization |
| di-π-methane rearrangement |
Dimroth–Reichardt  parameter |
| diode laser |
| diols |
| diosphenols |
| dioxin |
| dipolar aprotic solvent |
| dipolar bond |
| dipolar compounds |
| dipolar cycloaddition |
| dipolar ions |
| dipolar mechanism of energy transfer |
| dipole–dipole excitation transfer |
| dipole–dipole interaction |
| dipole-induced dipole forces |
| dipole length |
| dipole moment |
| dipole moment per volume |
| dipyrrins |
| dipyrromethenes |
| diradicals |
| direct amplification |
| direct current |
| direct effect |
| direct fission yield |
| direct-injection burner (for analytical flame
spectroscopy)
|
| direct-injection enthalpimetry |
| direct (radiochemical) isotope dilution analysis |
| direct reaction |
| direct thermometric method
in enthalpimetric analysis |
| direct transfer gas flow system
in spectrochemical
analysis |
| disaccharides |
| discomfort threshold in atmospheric chemistry |
| discontinuous analyser |
| discontinuous indication of an analyser |
| discontinuous measuring cell |
| discontinuous phase transition |
| discontinuous precipitation |
| discontinuous simultaneous techniques in analysis |
| discrete transport |
| discriminant analysis |
| discriminator |
| disintegration constant |
disintegration energy,  quantity |
| disintegration rate of a radioactive material |
| disjoining pressure (for the attraction between two
surfaces)
|
| dismutation |
| dispenser |
| dispersion (for spectroscopic instruments) |
| dispersion in atmospheric chemistry |
| dispersion forces |
| displacement chromatography |
| displacive transition |
| disproportionation |
| disrotatory |
| disruptor |
| dissociation |
dissociation energy,  ,
 quantity |
| dissociative adsorption (dissociative chemisorption) |
| dissociative ionization in mass spectrometry |
| dissociative surface reaction |
| dissolution |
| dissymmetry in stereochemistry |
| dissymmetry of scattering |
| distonic radical cation |
| distribuend |
| distribution |
| distribution coefficient |
| distribution constant |
| distribution constant in chromatography |
| distribution function in polymers |
| distribution isotherm in chromatography (1993, 65, 2377)superseded |
| distribution isotherm in chromatography (1996, 68, 1592) |
distribution ratio,
in liquid-liquid distributionquantity |
| disyndiotactic polymer |
| ditactic polymer |
| diterpenoids |
| dithioacetals |
| diurnal variation in atmospheric chemistry |
| dividing surface |
| DM-interference |
| DNA |
| DNA probe |
| Dobson unit in atmospheric chemistryunit |
| docking studies |
| dodecahedro- |
| dolichols |
| Donnan emf (Donnan potential) |
| Donnan equilibrium |
| Donnan exclusion |
| Donnan pressure |
| donor number (DN) |
| doping in catalysis |
| Doppler broadening of a spectral line |
| Dorn effect |
| dosage in atmospheric chemistry |
| dose |
| dose of a substance |
| dose in radioanalytical chemistry |
dose equivalent,  quantity |
| dose-response and dose-effect relationships |
| double-beam spectrometer (for luminescence
spectroscopy)
|
| double escape peak |
| double-focusing mass spectrograph |
| double-focusing mass spectrometer |
| double-layer |
| double-layer current |
| double-strand chain in polymers |
| double-strand copolymer |
| double-strand macromolecule |
| double-strand polymer |
| doublet state |
| double-wavelength spectroscopy |
doubling time  in biotechnologyquantity |
| downfield |
| down-time in analysis |
| downstream in membrane processes |
| downwash in atmospheric chemistry |
| 3D-QSAR (three-dimensional quantitative structure–activity relationships) |
| drift |
driving force (affinity) of a reaction,  quantity |
| droplet in atmospheric chemistry |
| drop time in polarography |
| drug |
| drug design |
| dry bulb temperature in atmospheric chemistry |
| drying agent |
| dual substituent-parameter equation |
| dust in atmospheric chemistry |
| dust collector in atmospheric chemistry |
| dust fall in atmospheric chemistry |
| dye laser |
| dynamic field(s) mass spectrometer |
| dynamic interfacial tension |
| dynamic membrane formation |
| dynamic quenching |
| dynamic range of an analyser |
| dynamic surface tension |
| dynamic thermomechanometry |
dynamic viscosity,  quantity |
| dyneunit |
| dyotropic rearrangement |
| dypnones |
| η (eta or hapto) in inorganic nomenclature |
| E, Z |
| early-downhill surface |
| eclipsed (eclipsing) |
| eclipsing conformation |
| eclipsing strain |
| ectohormone |
| eddy |
| eddy dispersion (diffusion) |
| educt |
| effective cadmium cut-off energy
in nuclear analytical chemistry |
| effective charge |
| effective chimney height (stack height) |
| effective half life |
| effectively infinite thickness
in flame spectroscopy |
| effective molarity (effective concentration) |
| effectiveness |
| effective theoretical plate number
of a chromatographic column |
| effective thermal cross-section |
| effective thickness of diffusion layer |
| effector |
efficiency,  of a stepquantity |
| efficiency of a counter |
| efficiency of atomization
in analytical flame spectroscopy |
efficiency of nebulization,  in flame spectrometryquantity |
| efficiency spectrum |
| efflorescence |
| effluent |
| effluent in chromatography |
| eicosanoids |
| eighteen-electron rule |
| einsteinunit |
| Einstein equation |
| elastic collision |
| elastic scattering in reaction dynamics |
| elastic scattering in spectrochemistry |
| electrical arc |
| electrical double-layer |
| electrical hygrometer |
| electric capacitance |
electric charge,  quantity |
electric coherence length,  in thin filmsquantity |
electric conductance,  quantity |
| electric conductivity |
electric current,  quantity |
electric current density,  quantity |
electric dipole moment,  quantity |
electric displacement,  quantity |
electric field (strength),  quantity |
electric mobility,  ,  quantity |
electric polarizability,  quantity |
electric potential difference,
of a galvanic cell |
electric potential,  quantity |
electric resistance,  quantity |
| electric resistivity |
| electric sector in mass spectrometry |
| electrified interphase |
| electroactive substance |
| electrocapillarity |
| electrocapillary equation |
| electrochemical detector in gas chromatography |
| electrochemical method of detection in analysis |
| electrochemical potential |
| electrochemiluminescence |
| electrochromic effect |
| electrocyclic reaction |
| electrodecantation (or electrophoresis convection) |
electrode current density,  quantity |
| electrode memory |
| electrodeposition |
electrode potential,  quantity |
| electrode process |
| electrode reaction |
| electrode reaction rate constants |
| electro-dialysis |
| electrodialysissuperseded |
| electro-endosmosis |
| electrofuge |
| electrogenerated chemiluminescence (ECL) |
| electrographite |
electrokinetic potential,  quantity |
| electroluminescence |
| electrolytic hygrometer |
| electromeric effect |
| electromigration |
electromotive force,  quantity |
| electron |
| electron acceptor |
electron affinity,  |
| electronation |
| electron attachment |
| electron capture |
| electron capture detector in gas chromatography |
| electron charge |
| electron configuration |
| electron correlation |
| electron-deficient bond |
| electron density |
| electron detachment |
| electron donor |
| electron-donor-acceptor complex |
| electronegativity |
| electron energy in mass spectrometry |
| electroneutrality principle |
| electron exchange excitation transfer |
| electronically excited state |
| electronic configuration |
| electronic effect of substituents: symbols and signs |
| electronic energy migration (or hopping) |
| electron impact ionization in mass spectrometry |
| electron ionization in mass spectrometry |
| electron jump |
| electron kinetic energy |
| electron microscopy |
| electron-pair acceptor |
| electron-pair donor |
| electron paramagnetic resonance (EPR) |
| electron probe microanalysis (EPMA) |
| electron probe X-ray microanalysis (EPXMA) |
| electron rest massconstant |
| electron spectroscopy for chemical analysis (ESCA) |
| electron stopping power
in X-ray emission spectroscopy |
| electron transfer |
| electron-transfer catalysis |
| electron transfer photosensitization |
| electronvoltunit |
electron work function,  |
| electro-osmosis (1996, 68, 1488) |
| electro-osmosis (1972, 31, 620)superseded |
electro-osmotic hold-up time,  in capillary electromigrationquantity |
electro-osmotic mobility,
 or
in capillary electromigrationquantity |
| electro-osmotic pressure |
| electro-osmotic velocity |
| electro-osmotic volume flow |
| electrophile (electrophilic) |
| electrophilicity |
| electrophoresis |
| electrophoresis convection |
electrophoretic mobility,  quantity |
electrophoretic velocity,  |
| electrophotography |
| electrosmosis |
| electrostatic filter |
| electrostatic precipitator |
| electrothermal atomizer
in spectrochemical analysis |
| electroviscous effects |
| element |
| elementary chargeconstant |
| elementary entity |
| elementary particle in nuclear chemistry |
| elementary reaction |
| element effect |
| element of chirality |
| elimination |
| eluate |
| eluent |
| elute |
| elution |
| elution band in chromatography |
| elution chromatography |
| elution curve |
| elutriation |
| emanation thermal analysis |
| embryo |
| emission |
| emission in atmospheric chemistry |
| emission control equipment
in atmospheric chemistry |
| emission flux in atmospheric chemistry |
| emission spectrum |
emittance,  quantity |
| empirical formula |
| emulsifier |
| emulsion |
| enamines |
| enantioconvergence |
| enantioenriched |
| enantiomer |
| enantiomer excess (enantiomeric excess) |
| enantiomerically enriched (enantioenriched) |
| enantiomerically pure (enantiopure) |
| enantiomeric groups |
| enantiomeric purity |
| enantiomeric ratio |
| enantiomeric units in a polymer |
| enantiomerization |
| enantiomerism |
| enantiomorph |
| enantiomorphous structures in polymers |
| enantiopure |
| enantioselectivity |
| enantiotopic |
| enantiotropic mesophase |
| enantiotropic transition |
| encapsulation in catalysis |
| encounter |
| encounter complex |
| encounter control |
| encounter-controlled rate |
| encounter pair |
| endergonic (or endoergic) reaction |
| end-group |
| endocytosis |
| endoenzymes |
| endo, exo, syn, anti |
| endothermic reaction |
| end-point |
| end-to-end distance in polymers |
| end-to-end vector in polymers |
| ene reaction |
| energized species |
energy,  quantity |
| energy of a radiation |
| energy dispersion in emission spectrometry |
| energy dispersive detector |
| energy dispersive X-ray fluorescence analysis |
| energy flux density |
| energy migration |
| energy of activation |
| energy of activation of an electrode reaction |
| energy pooling |
| energy profile |
| energy resolution in radiochemistry |
energy storage efficiency,  quantity |
| energy threshold in radiochemistry |
| energy transfer in photochemistry |
| energy transfer plot in photochemistry |
| energy yield of luminescence |
| enforced concerted mechanism |
| enhanced phosphorescence analysis
in luminescence spectroscopy |
| enhancement reaction in analytical chemistry |
| enhancer |
| enolates |
| enols |
| enophile |
| enoses |
enrichment factor,  in liquid-liquid distributionquantity |
| enrichment, isotopic |
| ent |
| entatic state |
| entering group |
| enthalpimetric analysis |
| enthalpimetric flow injection analysis |
| enthalpimetric titration |
| enthalpimetry |
| enthalpogram |
enthalpy,  quantity |
enthalpy of activation,
quantity |
| enthalpy of immersion |
| enthalpy of wetting |
| entitic |
| entitic quantity |
| entrainment in atmospheric chemistry |
| entrance channel |
entropy,  quantity |
entropy of activation,  quantity |
| entropy unitunit |
| envelope conformation |
| environmental (or ambient) monitoring |
| environmental stress cracking |
| enzyme activator |
| enzyme activity |
| enzyme induction in general chemistry |
| enzyme induction in medicinal chemistry |
| enzyme inhibitor |
| enzyme repression |
| enzymes |
| enzyme substrate electrode |
| enzyme thermistor |
| enzymic decomposition |
| epicadmium neutrons |
| epigenetic |
| epihalohydrins |
| epimerization |
| epimers |
| epi-phase |
| episulfonium ions |
| epithermal neutrons |
| epitope |
| epoxides |
| epoxy compounds |
| equatorial |
| equilibration |
| equilibrium constant |
| equilibrium control |
| equilibrium dialysate |
| equilibrium distance in a molecule |
| equilibrium film |
| equilibrium isotope effect |
| equilibrium reaction |
| equilibrium sedimentation |
| equilibrium solution |
| equivalence point |
| equivalence postulate in polymer chemistry |
| equivalent chain in polymers |
| equivalent diameter |
| equivalent entity |
| ergunit |
| error of measurement |
| erythro structures in a polymer |
| erythro, threo |
| ESCA |
| escape depth (for surface analysis techniques) |
| Esin and Markov coefficient |
| esters |
| ethers |
 -value |
| euatmotic reaction |
| eupeptide bond |
| eutectic reaction |
| evaluation function |
| evaporation |
| even-electron ion |
| evolved gas analysis (EGA) |
| evolved gas detection (EGD) |
| Ewens–Bassett number |
| exaSI unit prefix |
| excess acidity |
| excess mass (at a solid/liquid interface) |
| excess Rayleigh ratio |
| excess volume (at a solid/liquid interface) |
| exchange current of an electrode reaction |
| exchange extraction |
| exchange-inversion transition |
| exchange labelling |
| excimer |
| excimer laser |
| excimer-luminescence in luminescence quenching |
| excipient in toxicology |
| exciplex |
| exciplex-luminescence in luminescence quenching |
| excitation |
| excitation-emission spectrum |
| excitation energy |
| excitation energy in in situ microanalysis |
| excitation level in X-ray spectroscopy |
| excitation spectrum |
| excitation transfer |
| excited state |
| exciton |
| excluded volume of a macromolecule in polymers |
| excluded volume of a segment in polymers |
| exclusion chromatography |
| exergonic (exoergic) reaction |
| exfoliated graphite |
| exitance |
| exit channel |
| exo |
| exoenzymes |
| exon |
| exothermic reaction |
| expansion factor in polymers |
| expectation value |
| expected value |
| experimental perturbational calculation |
| explosivity limits (explosion limits) |
| exponential decay |
| exposure |
| exposure in medicinal chemistry |
| exposure in nuclear chemistry |
| expression in biotechnology |
| extended-chain crystal in polymers |
| extended Hammett equation |
| extended X-ray absorption fine structure (EXAFS) |
| extensive quantity |
| extent of an interface (surface) |
extent of reaction,  quantity |
| external compensation |
| external heavy atom effect |
| external ion-pair return |
| external ion return |
| external photoelectric effect |
| external return |
| external standard in chromatography |
| external surface |
| exterplex |
| extinction |
| extinction coefficient |
| extra-column volume in chromatography |
| extract (noun) |
| extract (verb) |
| extractability in solvent extraction |
| extractant |
| extracting agent |
| extraction |
| extraction in process liquid-liquid distribution |
| extraction coefficient |
| extraction (equilibrium) constant |
extraction factor,  quantity |
| extraction fractionation of polymers |
| extraction isotherm |
| extraction process in catalysis |
| extrapolated range in radiochemistry |
| extremophiles |
| extrusion transformation |
| fabric filter |
| fac- |
| factor |
| factor-group splitting |
| fallout in atmospheric chemistry |
| fall time |
| fanning in atmospheric chemistry |
| faradunit |
| faradaic current |
| faradaic current density |
| faradaic demodulation current |
| faradaic rectification current |
| Faraday constantconstant |
| Faraday cup (or cylinder) collector |
| fast atom bombardment ionization |
| fast-atom bombardment (FAB) mass spectroscopy |
| fast neutrons |
| fatty acids |
| feedback in analysis |
| feedback in kinetics |
| feed-back inhibition (end product inhibition)
in biotechnology |
| feed rate in catalysis |
| femtoSI unit prefix |
| fenestranes |
| Fenton reaction |
| fermentation |
| fermenter |
| fermiunit |
| Fermi energy |
Fermi level,  |
| fermion |
| feromone |
| ferredoxin |
| ferrimagnetic transition |
| ferrocenophanes |
| ferroelastic transition |
| ferroelectric (antiferroelectric) transition |
| ferroic transition |
| ferromagnetic transition |
| fertile in radioanalytical chemistry |
| f-functional branch point |
| f-functional branch unit |
| fibrous activated carbon |
| fibrous carbon |
| fibrous crystal in polymers |
| fiducial group |
| field desorption in mass spectrometry |
| field effect |
| field effect phototransistor |
| field ionization in mass spectrometry |
| field level |
| filamentous carbon |
| filler |
| filler coke |
| filling solution of a reference electrode |
| film |
| film badge in radioanalytical chemistry |
| film element |
| film tension |
| filter |
| filter of a radiation |
| filter spectrometer |
| filtration |
fine structure constant,  constant |
| first-order phase transition |
| first-pass effect |
| Fischer projection (Fischer–Tollens projection) |
| Fischer–Rosanoff convention (or Rosanoff convention) |
| Fischer–Tollens projection |
| fissile in radioanalytical chemistry |
| fissionable |
| fission fragment ionization in mass spectrometry |
| fission fragments |
| fission neutrons |
| fission products |
| fission yield |
| fixed ions |
| fixed neutral loss (gain) scan
in mass spectrometry |
| fixed neutral loss (gain) spectrum
in mass spectrometry |
| fixed precursor ion scan in mass spectrometry |
| fixed product ion scan in mass spectrometry |
| fixed product ion spectrum in mass spectrometry |
| flagpole |
| flame-in-tube atomizer in spectrochemical analysis |
| flame ionization detector in gas chromatography |
| flame photometric detector in gas chromatography |
| flame photometry |
| flammable limits |
| flash fluorimetry (phosphorimetry) |
| flash lamps |
| flash photolysis |
| flash point |
| flash vacuum pyrolysis (FVP) |
| flat band potential (at a semiconductor/solution
interphase)
|
| flat bands |
| flavins |
| flavonoids (isoflavonoids and neoflavonoids) |
| flavoproteins |
| flavylium salts |
| floating monolayer |
| floc |
| flocculation |
| floccule |
| Flory–Huggins theory |
| flotation |
| flow analysis |
| flow birefringence |
| flow enthalpimetry |
| flow injection |
| flow injection enthalpimetry |
| flow-programmed chromatography |
| flow rate in chromatography |
| flow rate
in flame emission and absorption spectrometry |
| flow rate of a quantity |
| flow rate of unburnt gas mixture
in flame emission and absorption spectrometry |
| flow reactor |
flow resistance parameter,  in chromatographyquantity |
| flue gas in atmospheric chemistry |
| flue gas scrubber in atmospheric chemistry |
fluence,  ,
 ,
 quantity |
| fluid coke |
fluidity,  quantity |
| fluidized bed |
| fluoresceins |
| fluorescence |
| fluorescence error in spectrochemical analysis |
| fluorescence excitation of X-rays |
| fluorescence yield |
| fluorimeter |
| fluorocarbons |
| fluorohydrins |
flux,  of a quantity |
| flux depression |
| fluxional |
| fly ash in atmospheric chemistry |
| f number |
| foam |
| foam fractionation |
| foaming agent |
| fog |
| fog horizon in atmospheric chemistry |
| folates |
| fold in polymer crystals |
| fold domain in polymer crystals |
| folded-chain crystal in polymers |
| fold plane in polymer crystals |
| fold surface in polymer crystals |
| footunit |
| forbidden line in X-ray spectroscopy |
force,  quantity |
| force constants |
| force-field calculation |
| foreign-gas broadening |
| formamidine disulfides |
| formation constant |
| formazans |
| Förster cycle |
| Förster excitation transfer (dipole–dipole excitation
transfer)
|
| forward scattering |
| fossil fuel |
| fouling agent in catalysis |
| fouling in membrane processes |
| Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer
|
| Fourier transform spectrometer |
| fraction |
| fractional change of a quantity |
| fractional selectivity in catalysis |
| fractionation of analytes |
| fractionation of polymers |
| fraction collector in chromatography |
fraction extracted,  quantity |
| fragmentation |
| fragmentation reaction in mass spectrometry |
| fragment ion in mass spectrometry |
| frame-shift mutation |
| Franck–Condon principle |
| Franck–Condon state |
| franklinunit |
| free charge density on the interface |
| free electron laser |
| free energy |
| freely draining |
| freely jointed chain in polymers |
| freely rotating chain in polymers |
| free radical |
| free rotation (hindered rotation, restricted
rotation)
|
| free-running laser |
| free spiro union |
| freezing |
| freezing out in atmospheric chemistry |
frequency,  ,  quantity |
| frequency distribution |
| frequency doubling |
frictional coefficient,
 in polymer chemistryquantity |
| friction coefficient |
friction factor,  quantity |
| fringed-micelle model in polymer crystals |
| frontal chromatography |
| frontier orbitals |
| fronting in chromatography |
| front surface geometry in luminescence |
| frost point hygrometer |
| froth flotation |
| Frumkin effect |
| fucolipid |
| fuel cycle (nuclear) |
| fuel element (nuclear) |
| fuel reprocessing (nuclear) |
fugacity,  ,  quantity |
fugacity coefficient,  quantity |
| fulgides |
| full energy peak |
| fullerenes |
| fulminates |
| fulvalenes |
| fulvenes |
| fume in atmospheric chemistry |
| fumes |
| fumigation in atmospheric chemistry |
| functional class name |
| functional group |
| functional parent |
| fungicide |
| furanocoumarins |
| furanoses |
| furnace black |
| furnace pyrolysis in spectrochemical analysis |
| furocoumarins |
| fusion in biotechnology |
| fusion name |
| FWHM (Full Width at Half Maximum) |
| γ-cascade |
| γ-quantum |
| γ-radiation |
| γ-ray spectrometer |
 value in nuclear chemistryquantity |
gain,  of a photomultiplierquantity |
| galvanic corrosion |
| Galvani potential difference |
| gas analysis installation in atmospheric chemistry |
| gas black (carbon black, channel black, furnace
black)
|
| gas chromatography (GC) |
| gas constantconstant |
| gaseous diffusion separator
in atmospheric chemistry |
| gas-filled phototube |
| gas-filled X-ray detector |
| gas laser |
| gas-liquid chromatography |
| gas-phase acidity |
| gas-phase basicity |
| gas-phase-grown carbon fibres |
| gas sensing electrode |
| gas-solid chromatography |
| gated photodetector |
| gauche |
| gauche conformation in polymers |
| gauche effect |
| gaussunit |
| Gaussian band shape |
| Geiger counter |
| Geiger–Muller counter tube |
| gel |
| gel permeation chromatography |
| geminate pair |
| geminate recombination |
| gene (cistron) |
| gene amplification |
| gene library |
| gene manipulation |
| general acid–base catalysis |
| general acid catalysis |
| general base catalysis |
general force field ( ) |
| generalized transition-state theory |
| generally labelled tracer |
generation time,  in biotechnologyquantity |
| genetic algorithm |
| genetic code |
| genome |
| genomics |
| genotype |
| geometrical equivalence in polymers |
| geometric attenuation |
| geometric isomerism |
geometric (logarithmic) mean,  |
| geometric surface (interface) area |
| geometry (counting) in radioanalytical chemistry |
| geometry factor in radioanalytical chemistry |
| germylenes |
| germylidenes |
| Gibbs adsorption |
| Gibbs dividing surface |
Gibbs energy (function),  quantity |
| Gibbs energy diagram |
Gibbs energy of activation (standard free energy of activation),
quantity |
| Gibbs energy of repulsion |
| Gibbs energy profile |
| Gibbs film elasticityquantity |
| Gibbs surface |
| gigaSI unit prefix |
| glass electrode error |
| glass laser |
| glass-like carbon |
| glass transition |
| glass-transition temperature |
| globular-chain crystal in polymers |
| glove box |
| glycals |
| glycans |
| glycaric acids |
| glycerides |
| glycerophospholipid |
| glycitols |
| glyco-amino-acid |
| glycoconjugate |
| glycoglycerolipid |
| glycolipids |
| glycols |
| glyconic acids |
| glycopeptides (glycoproteins) |
| glycoproteins |
| glycosamines |
| glycosaminoglycan |
| glycoses |
| glycosides |
| glycosphingolipid |
| glycosylamines |
| glycosyl-amino-acid |
| glycosyl group |
| glycuronic acids |
| Gouy layer in electrochemistry |
| grab sampling |
| gradient |
| gradient elution in chromatography |
| gradient layer in chromatography |
| gradientless reactor in catalysis |
| gradient packing |
| gradual (sudden) potential-energy surface |
| graft copolymer |
| graft copolymerization |
| grafting in catalysis |
| graft macromolecule |
| graft polymer |
| gramunit |
| Gram stain |
| granular carbon |
| graphene layer |
| graphite |
| graphite electrode |
| graphite fibres |
| graphite material |
| graphite whiskers |
| graphitic carbon |
| graphitizable carbon |
| graphitization |
| graphitization heat treatment |
| graphitized carbon |
| gravimetric method |
| gravitational constantconstant |
| grayunit |
| green coke |
| greenhouse effect in atmospheric chemistry |
| Grignard reagents |
| grist |
| grit in atmospheric chemistry |
| ground level concentration
in atmospheric chemistry |
| ground level inversion in atmospheric chemistry |
| ground state |
| group |
| group electronegativity |
| group preconcentration in trace analysis |
| growth curve of activity |
| growth rate in biotechnology |
| Grunwald–Winstein equation |
| guest |
| Guinier plot |
| gustiness in atmospheric chemistry |
| Haber–Weiss reaction |
| haem |
| half-chair |
half life,  |
| half life of a radionuclide |
| half-peak potential |
| half thickness in radiochemistry |
| half-wave potential |
| half-width of a band |
| halirenium ions |
| halochromism |
| haloforms |
| halohydrins |
| halonium ions |
| halophiles |
hamiltonian operator  |
| Hammett acidity function |
| Hammett equation (Hammett relation) |
| Hammond–Herkstroeter plot |
| Hammond principle (Hammond postulate) |
| handedness |
| Hansch analysis |
| Hansch constant |
| Hantzsch–Widman name |
| hapten |
| hapto |
| hard acid |
| hard amorphous carbon films |
| hard base |
| hard-sphere collision cross section |
| harmonic frequency generation |
| harmonic mean |
| harpoon mechanism |
| hartree |
| Hartree energyconstant |
| Haworth representation |
| hazard |
| haze in atmospheric chemistry |
| haze horizon in atmospheric chemistry |
| health surveillance |
heat,  ,
 quantity |
heat capacity,  quantity |
heat capacity of activation,  quantity |
heat flux,  quantity |
| heavy atom effect |
| heavy atom isotope effect |
| heavy water |
| hectoSI unit prefix |
height equivalent to an effective theoretical plate
( )
in chromatography |
height equivalent to a theoretical plate ( )
in chromatography |
| helicenes |
| helicity |
| helion |
| helium–cadmium laser |
| helium dead-space in colloid and surface chemistry |
| helium ionization detector in gas chromatography |
| helium–neon laser |
| helix |
| helix residue in a polymer |
| helix sense |
Helmholtz energy (function),  quantity |
| hemes (heme derivatives) |
| hemiacetals |
| hemiaminals |
| hemiketals |
| hemileptic |
| hemins |
| hemochromes |
| hemodialysis |
| hemoglobins |
| Henderson–Hasselbalch equation |
| henryunit |
| Henry's law |
| Herkstroeter plot |
| hertzunit |
| Herz compounds |
| hetarenes |
| hetaryl groups |
| hetarynes |
| heteroalkenes |
| heteroarenes |
| heteroaryl groups |
| heteroarynes |
| heterobimetallic complex |
| heterochain polymer |
| heteroconjugation |
| heterocumulenes |
| heterocyclic compounds |
| heterocyclyl groups |
| heterodetic cyclic peptide |
| heterodisperse |
| heteroexcimer |
| heterogeneity in analytical chemistry |
| heterogeneous catalysis |
| heterogeneous diffusion rate constant
in electrochemistry |
| heterogeneous membrane electrode |
| heterogeneous nucleation |
| heteroleptic |
| heterolysis (heterolytic) |
| heterolytic bond-dissociation energy |
| heterolytic dissociative adsorption |
| heteropolysaccharide (heteroglycan) |
| heterotactic polymer |
| heterotactic triads in polymers |
| heterotopic |
| heterotrophic (organisms) |
| heterovalent hyperconjugation |
| hexagonal graphite |
| hexahedro- in inorganic nomenclature |
| hexaprismo- in inorganic nomenclature |
| hidden return |
| high-spin |
| higher-order transition |
| highly oriented pyrolytic graphite |
| high-pressure graphitization |
| high-pressure mercury lamp (arc) |
| high resolution energy loss spectroscopy (HRELS) |
| Hildebrand parameter |
| hindered rotation |
| histones |
| Hofmann rule |
| hold-back carrier |
| hold-up volume in chromatography |
hold-up volume (time),  ,
in column chromatography |
| hole burning |
| hole transfer |
| holoenzyme |
| Holtsmark broadening of a spectral line |
| homo |
| homoaromatic |
| homochain polymer |
| homochiral |
| homoconjugation |
| homocyclic compounds |
| homodetic cyclic peptide |
| homogeneity in analytical chemistry |
| homogeneous catalysis |
| homogeneous membrane electrode |
| homogeneous nucleation |
| homogeneous nucleus |
| homoleptic |
| homolysis (homolytic) |
| homolytic dissociative adsorption |
| homomorphic |
| homopolymer |
| homopolymerization |
| homopolysaccharide (homoglycan) |
| homotopic |
| horizontal elution (horizontal development)
in planar chromatography |
| host |
| host-vector system |
| hot atom |
| hot cell |
| hot ground state reaction |
| hot quartz lamp |
| hot state reaction |
| hourunit |
| Hückel (4n + 2) rule |
Huggins coefficient,  quantity |
| Huggins equation |
| humidity in atmospheric chemistry |
| Hund rules |
| Hush model |
| HWHM (Half Width at Half Maximum) |
| hybridization |
| hybridoma |
| hydration |
| hydrazide hydrazones |
| hydrazide imides |
| hydrazides |
| hydrazidines |
| hydrazines |
| hydrazinylidenes |
| hydrazo compounds |
| hydrazones |
| hydrazonic acids |
| hydride |
| hydro |
| hydrocarbon cracking |
| hydrocarbons |
| hydrocarbylene groups |
| hydrocarbyl groups |
| hydrocarbylidene groups |
| hydrocarbylidyne groups |
| hydrocarbylsulfanyl nitrenes |
| hydrocracking unit |
| hydrodynamically equivalent sphere in polymers |
| hydrodynamic volume in polymers |
| hydrogen |
| hydrogen bond |
| hydrogen gas electrode |
| hydrolases |
| hydrolysis |
| hydrometeor in atmospheric chemistry |
| hydron |
| hydroperoxides |
| hydrophilic |
| hydrophilicity |
| hydrophobic interaction |
| hydrophobicity |
| hydropolysulfides |
| hydrosphere in atmospheric chemistry |
| hydrosulfides |
| hydroxamic acids |
| hydroximic acids |
| hydroxylamines |
| hygrometer |
| hygrometry (moisture analysis) |
| hyperchromic effect |
| hyperconjugation |
| hypersatellite in X-ray spectroscopy |
| hypho- |
| hypochromic effect |
| hypo-phase |
| hypsochromic shift |
| hysteresis |
| icosahedro- |
| icosanoids |
| ideal adsorbed state |
| ideal chromatography |
| ideal dilute solution |
| ideal gas |
| ideal, non-linear chromatography |
| ideally polarized (electrified) interphase |
| ideally unpolarized (electrified) interphase |
| ideal mixture |
| identity period of a polymer |
| identity reaction |
illuminance,  ,
 quantity |
| image converter tube |
| image dissection tube |
| imaging (photoimaging) |
| imbalance |
| imbibition in colloid chemistry |
| imenes |
| imides |
| imidic acids |
| imidines |
| imidogens |
| imidonium ions |
| imidoyl carbenes |
| imidoyl nitrenes |
| imin |
| imine radical |
| imines |
| iminium compounds |
| imino acids |
| imino carbenes |
| iminooxy (iminoxy) radicals |
| iminoxyl radicals |
| iminyl carbenes |
| iminylium ions |
| iminyl radicals |
| immersional wetting |
| immission in atmospheric chemistry |
| immission dose in atmospheric chemistry |
| immission flux in atmospheric chemistry |
| immission rate in atmospheric chemistry |
| immobile adsorption |
| immobilized phase in chromatography |
| immobilization in biotechnology |
| immobilization by adsorption in catalysis |
| immobilization by inclusion in catalysis |
| immobilized enzyme |
| immune response |
| immunization |
| immunoassay |
| immunochemistry |
| immunogen |
| immunoglobulin (Ig) |
| immunoradiometric assay |
| immunosuppression |
| impaction |
impact parameter,  quantity |
impedance,  quantity |
| impingement |
| impinger |
| imprecision in analysis |
| impregnation in chromatography |
| improved canonical variational transition-state theory
(ICVTST)
|
| impulsive reaction |
| inaccuracy in analysis |
| inchunit |
| incidence in medicinal chemistry |
| incinerator |
| inclusion compound (inclusion complex) |
| incoherent radiation |
| incoherent scattering |
| incoherent structure |
| incongruent reaction |
| increment (for bulk materials and large units) |
| indicated hydrogen |
| indicator (visual) |
| indicator electrode |
| indicator reaction |
| indifferent absorbing ion |
| indifferent electrolyte |
| indirect amplification |
| indirect reaction |
| individual isotherm in surface chemistry |
| individual particle analysis |
individual perception threshold ( )
in atmospheric chemistry |
| induced radioactivity |
| induced reaction |
| inducer in enzyme catalysis |
| induction in enzyme catalysis |
| induction period |
| inductive effect |
| inductomeric effect |
| inductor |
| inelastic collision |
| inelastic scattering |
| inert |
| inert gas |
| inertial defect |
| inertial separator |
| infinite source thickness |
| information theory |
| inherent viscosity of a polymer |
| inhibition |
| inhibitor |
inhibitory concentration ( )quantity |
inhibitory dose ( )quantity |
| inhomogeneity error in spectrochemical analysis |
| initial energy in in situ microanalysis |
| initial rate method |
| initial (final) state correlations |
| initiation |
| initiator |
| injection temperature in chromatography |
| in-laboratory processing in analytical chemistry |
inner electric potential,  quantity |
| inner filter effect |
| inner Helmholtz plane (IHP) |
| inner layer (compact layer) in electrochemistry |
| inner orbital X-ray emission spectra |
| inner salts |
| inner-sphere electron transfer |
| inoculation |
| inositols |
| in-out isomerism |
| input rate in analysis |
| insert in biotechnology |
| insertion |
| in situ microanalysis |
| in situ micro-X-ray diffraction (Kossel-technique) |
| instability (with reference to instrumentation) |
| instantaneous current |
| instantaneous rate of flow in polarography |
| instantaneous (spot) sampling
in atmospheric chemistry |
| instrumental activation analysis |
| instrumental dependability |
| instrumental indication (for a precision balance) |
| integral capacitance of an electrodequantity |
| integral detector in chromatography |
| integrating sphere |
| intended crossing of potential-energy surfaces |
| intensity |
| intensity (relative to base peak)
in mass spectrometry |
| intensive quantity |
| interaction distance |
| intercalation compounds |
| intercalation reaction |
| interchromophoric radiationless transition |
| interconal region |
| interconvertible enzyme |
| interface |
interfacial concentration,  in electrochemistry |
| interfacial double-layer |
| interfacial layer |
interfacial layer width,  in thin films |
| interfacial region |
| interfacial tension |
| interference in analysis |
| interference filter |
| interfering lines |
| interfering substance
in electroanalytical chemistry |
| interferometer |
| interferons |
| intermediate |
| intermediate neutrons |
| intermolecular |
| intermolecular radiationless transition |
internal absorptance,  quantity |
| internal compensation |
| internal conversion |
internal energy,  quantity |
| internal filling solution of a glass electrode |
| internal reference electrode |
| internal return |
| internal standard in chromatography |
| internal surface |
| internal transmittance |
internal valence force field ( ) |
| international calorie |
| International system of units |
| international unit |
interparticle porosity,  in chromatographyquantity |
interparticle volume of the column,
in chromatographyquantity |
| interpenetrating polymer network (IPN) |
| interphase |
| interphase transition |
| interstitial fraction in chromatography |
| interstitial velocity in chromatography |
| interstitial volume in gas chromatography |
| intersystem crossing |
| interval analysis |
| intervalence charge transfer |
| interzonal region |
| intimate ion pair |
| intra- in organic reaction mechanisms |
| intrachromophoric radiationless transition |
| intramolecular |
| intramolecular catalysis |
| intramolecular isotope effect |
| intraphase transition |
intrinsic activation energy,
 quantity |
| intrinsic barrier |
| intrinsic detector efficiency |
| intrinsic full energy peak efficiency |
| intrinsic photopeak efficiency |
| intrinsic viscosity of a polymer |
| intron |
| inverse isotope effect |
| inverse kinetic isotope effect |
| inverse micelle |
| inverse square law in radiation chemistry |
| inversion |
| inversion height in atmospheric chemistry |
| inversion point in phase transitions |
| inverted micelle |
| inverted region (for electron transfer) |
| in vitro |
| in vivo |
| iodohydrins |
| iodometric titration |
| iodonium ions |
| ion |
| ion collector in mass spectrometry |
| ion cyclotron resonance (ICR) mass spectrometer |
| ion energy loss spectra in mass spectrometry |
| ion exchange |
| ion-exchange chromatography |
| ion-exchange isotherm |
| ion-exchange membrane |
| ion exchanger |
| ion-free layer |
| ion pumps |
| ionic concentration |
| ionic conductivityquantity |
| ionic copolymerization |
| ionic dissociation in mass spectrometry |
| ionic polymerization |
| ionic spectral lines |
ionic strength,  quantity |
ionic transport number,  quantity |
| ionization |
| ionization buffer in flame spectroscopy |
| ionization by sputtering |
| ionization chamber |
| ionization cross-section |
| ionization efficiency |
| ionization efficiency curve in mass spectrometry |
ionization energy,
 quantity |
| ionization potential |
| ionizing collision in mass spectrometry |
| ionizing power |
| ionizing radiation |
| ionizing voltage |
| ion kinetic energy spectrum in mass spectrometry |
| ion laser |
| ion microscopy |
| ion/molecule reaction in mass spectrometry |
| ion/neutral species exchange reaction
in mass spectrometry |
| ion/neutral species reaction in mass spectrometry |
| ionogenic groups |
| ionomer |
| ionomer molecule |
| ion pair |
| ion-pair formation in mass spectrometry |
| ion pair return |
| ion probe microanalysis (IPMA) |
| ion radical |
| ion scattering spectrometry (ISS) |
| ion-selective electrode (ISE) |
| ion-selective electrode cell |
| ion source in mass spectrometry |
| ion trap mass spectrometer |
| ionophore |
| ipso-attack |
| iridescent layers |
| iridoids |
| iron-sulfur cluster |
| iron-sulfur proteins |
irradiance,  quantity |
| irradiation |
| irregular macromolecule |
| irregular polymer |
| irreversible transition |
| isoabsorption point |
| isobar in atmospheric chemistry |
| isobaric mass-change determination |
| isobaric separation |
| isobars |
| isoclined structures in polymers |
| isoclinic point |
| isoconfertic separation |
| isocoumarins |
| isocratic analysis in chromatography |
| isocyanates |
| isocyanides |
| isocyclic compounds |
| isodesmic reaction |
| isodiazenes |
| isoelectric |
| isoelectric point in electrophoresis |
| isoelectronic |
| isoemissive point |
| isoentropic |
| isoenzyme |
| isoequilibrium relationship |
| isoflavonoids |
| isoionic |
| isoionic point in electrophoresis |
| isokinetic line in atmospheric chemistry |
| isokinetic relationship |
| isokinetic sampling in atmospheric chemistry |
| isolated double bonds |
| isolobal |
| isomer |
| isomerases |
| isomeric |
| isomeric state in nuclear chemistry |
| isomeric transition in nuclear chemistry |
| isomerism |
| isomerization |
| isomer shift in Mössbauer spectroscopy |
| isometric |
| isomorphous structures in polymers |
| isonitriles |
| isonitroso compounds |
| isooptoacoustic point |
| isopeptide bond |
| isopotential point |
| isoprenes |
| isoprenoids |
| isopycnic |
| isopycnic separation |
| isorefractive |
| isosbestic point |
| isoselective relationship |
| isoselenocyanates |
| isosteric enthalpy of adsorption |
| isostilbic point |
| isotactic macromolecule |
| isotactic polymer |
| isotactic triads in polymers |
| isotherm in atmospheric chemistry |
| isothermal chromatography |
| isothiocyanates |
| isotones |
| isotope dilution |
| isotope dilution analysis |
| isotope effect |
| isotope exchange |
| isotope exchange analysis |
| isotope pattern in mass spectrometry |
| isotopes |
| isotopic abundance |
| isotopically deficient |
| isotopically enriched ions |
| isotopically labelled |
| isotopically modified |
| isotopically substituted |
| isotopically unmodified |
| isotopic carrier |
| isotopic enrichment |
| isotopic enrichment factor |
| isotopic fractionation factor |
| isotopic ion |
| isotopic labelling |
| isotopic molecular ion |
| isotopic scrambling |
| isotopic separation |
| isotopic tracer |
| isotopologue |
| isotopomer |
| isotropic |
| isotropic carbon |
| isotropic pitch-based carbon fibres |
| isoureas |
| isovalent hyperconjugation |
| isozyme |
| j-value in atmospheric chemistry |
| Jablonski diagram |
| Jahn–Teller effect |
| Jahn–Teller transition |
| jouleunit |
| junction point |
| junction unit |
| κ (kappa) in inorganic nomenclature |
| Kamlet–Taft solvent parameters |
| Kaptein–Closs rules |
| Kasha rule |
| Kasha–Vavilov rule |
| katalunit |
| Kekulé structure (for aromatic compounds) |
| kelvinunit |
| ketals |
| ketazines |
| ketenes |
| ketenimines |
| ketides |
| ketimines |
| keto |
| ketoaldonic acids |
| ketoaldoses |
| keto carbenes |
| ketones |
| ketoses |
| ketoximes |
| ketyls |
| kiloSI unit prefix |
| kilogramunit |
| kind-of-property |
| kind-of-quantity |
| kinematics |
kinematic viscosity,  quantity |
| kinetic activity factor |
| kinetic ambiguity |
| kinetic control of product composition |
| kinetic current |
| kinetic electrolyte effect (kinetic ionic-strength effect)
|
kinetic energy,  quantity |
| kinetic equivalence |
| kinetic isotope effect |
| kinetic method of analysis |
| kinetic resolution |
| kinetic synergist |
| kinetic theory of collisions |
| klado- |
| Koopmans' theorem |
| Koppel–Palm solvent parameters |
| Kosower Z-value |
| Kováts (retention) index |
| Krafft point |
| Kratky plot |
| krypton ion laser |
| lambda |
| Λ (lambda) |
|
λ-transition
(lambda-transition) |
| L |
| l |
| l, u |
| label |
| labelling |
| labile |
| laboratory sample |
| lachrymator |
| lactams |
| lactides |
| lactims |
| lactols |
| lactones |
| ladder chain |
| ladder macromolecule |
| ladder polymer |
| lag phase in biotechnology |
| Lambert law |
| lamellar crystal |
| lamp |
| lamp black |
| Landolt reaction |
| Langmuir–Blodgett (LB) membrane |
| Langmuir–Hinshelwood mechanism |
| Langmuir monolayer |
| Langmuir–Rideal (Rideal–Eley) mechanism |
| Laporte rule |
| lapse rate in atmospheric chemistry |
| large particle in radiation scattering |
| lariat ethers |
| laser |
| laser beam ionization |
| laser ionization in mass spectrometry |
| laser micro emission spectroscopy
(LAMES)
|
| laser micro mass spectrometry
(LAMMS) |
| laser Raman microanalysis (LRMA) |
| lasing |
| late-downhill surface |
| latent image |
| latent period (latency) in medicinal chemistry |
| lateral order in a polymer |
| lateral resolution in in situ microanalysis |
| latex |
| lath crystal |
| lattice distortion |
| laws of distribution in precipitation |
| layer |
| layer equilibrium in chromatography |
| leader sequence in biotechnology |
| least-squares technique |
| leaving group |
| lecithins |
| lectins |
| Leffler's assumption |
| left-to-right convention |
length,
quantity |
| lethal concentration |
| lethal dose |
| lethal synthesis |
| leuco bases |
| leuco compounds |
| leukotrienes |
| level |
| levelling effect |
level width,
quantity |
| Lewis acid |
| Lewis acidity |
| Lewis adduct |
| Lewis base |
| Lewis basicity |
| Lewis formula (electron dot or Lewis structure) |
| LIDAR in atmospheric chemistry |
lifetime (mean lifetime),
quantity |
| lifetime of luminescencequantity |
| ligand field |
| ligand field splitting |
| ligands |
| ligand to ligand charge transfer (LLCT) transition |
| ligand to metal charge transfer (LMCT) transition |
| ligases (synthetases) |
| ligate |
| light-atom anomaly |
| light polarization |
| light scattering |
| light source |
| lignans |
| lignins |
| limiting adsorption current |
| limiting catalytic current |
| limiting condition of operation |
| limiting current |
| limiting differential diffusion coefficient |
| limiting diffusion current |
| limiting kinetic current |
| limiting mean |
| limiting migration current |
| limiting sedimentation coefficient |
| limiting viscosity number |
| limit of detection in analysis |
| limit test in toxicology |
| linear absorption coefficient |
| linear (decadic) absorption coefficient
in optical spectroscopy |
| linear attenuation coefficient |
| linear (decadic) attenuation coefficient
in optical spectroscopy |
| linear chain |
| linear chromatography |
| linear copolymer |
| linear dispersion |
| linear distribution isotherm in chromatography |
| linear electron accelerator |
| linear energy transfer |
| linear free-energy relation |
| linear Gibbs energy relation |
| linearity of responsivity (of a radiation detector) |
| linear macromolecule |
| linear polarizer |
| linear polymer |
| linear pulse amplifier |
| linear range |
| linear solvation energy relationships |
linear strain,
 ,
quantity |
| line formula |
| lineic |
| line-of-centres model |
| line repetition groups |
| line-shape analysis |
| Lineweaver–Burk plot |
| line width |
| line width in Mössbauer spectroscopy |
| linked scan in mass spectrometry |
| lipid film |
| lipids |
| lipophilic |
| lipophilicity |
| lipophobic |
| lipopolysaccharides |
| lipoproteins |
| liposome |
| Lippman's equation |
| liquid chromatography (LC) |
| liquid-coated stationary phase (material) in liquid chromatography |
| liquid crystal |
| liquid-crystal dendrimer |
| liquid-crystalline phase |
| liquid-crystal polymer |
| liquid-crystal state |
| liquid-crystal transitions |
| liquid excimer laser |
| liquid-gel chromatography |
| liquid ion exchange |
| liquid ion laser |
| liquid junction |
| liquid laser |
| liquid-liquid distribution (extraction) (partition) |
| liquid-liquid extraction |
| liquid membrane |
| liquid-phase loading in chromatography |
| liquid scintillation detector |
| liquidus |
| liquid volume in gas chromatography |
| lithometeor in atmospheric chemistry |
| lithosphere in atmospheric chemistry |
| litreunit |
| live time |
| living copolymerization |
| living polymerization |
| load (on a precision balance) |
| loading capacity in solvent extraction |
| local conformation of a polymer |
| local current density |
local efficiency of atomization,
in flame spectrometryquantity |
local flame temperature,
in flame emission and absorption spectrometry |
local fraction atomized,
 ,
in flame emission and absorption spectrometryquantity |
local fraction desolvated,
 ,
in flame emission and absorption spectrometryquantity |
local fraction volatilized,
 ,
in flame emission and absorption spectrometryquantity |
| localized adsorption |
| localized-itinerant transition |
| lock-in state |
| logarithmic distribution coefficient
in precipitation |
| logarithmic normal distribution
of a macromolecular assembly |
| logarithmic viscosity number |
| logit |
| log-normal distribution |
| London–Eyring–Polanyi (LEP) method |
| London–Eyring–Polanyi–Sato (LEPS) method |
| London forces |
| lone (electron) pair |
| long chain |
| long-chain branch |
| longitudinal order in a polymer |
| long-lived collision complex |
| long-range intramolecular interaction in polymers |
| long spacing in polymer crystals |
| loose end |
| loose ion pair |
| Lorentz broadening of a spectral line |
| Lorentzian band shape |
| Lorenz–Mie theory |
| lot in analytical chemistry |
| low energy electron diffraction (LEED) |
| lowest lethal concentration found |
| lowest-observed-adverse-effect-level (LOAEL)replaced |
| lowest observed adverse effect level (LOAEL) |
| lowest-observed-effect-level (LOEL) |
| low-pressure diamond |
| low pressure electrical discharge |
| low-pressure mercury lamp (arc) |
| low-spin |
| low temperature UV–VIS absorption spectroscopy |
|
lumen
unit |
| luminancequantity |
| luminescence |
| luminescence quenching |
| luminescence spectrometer |
| luminous flux |
luminous intensity
quantity |
| luminous quantities |
| lumiphore (luminophore) |
| LUMO |
|
lux
unit |
| lyases |
| lyate ion |
| lyonium ion |
| lyophilic |
| lyophilic sols |
| lyophobic |
| lyotropic mesophase |
| lysimeter |
| µ- (mu) in inorganic nomenclature |
| M |
| machine in analysis |
| macrocycle |
| macrolides |
| macrometeorology in atmospheric chemistry |
| macromolecular |
| macromolecular isomorphism |
| macromolecule (polymer molecule) |
| macromonomer |
| macromonomeric unit (macromonomer unit) |
| macromonomer molecule |
| macromonomer unit |
| macropore in catalysis |
| macroradical |
| macroscopic cross-section |
| macroscopic diffusion control |
| macroscopic film |
| macroscopic kinetics |
| magic acid |
| magnetic circular dichroism (MCD) |
magnetic coherence length,
in thin filmsquantity |
| magnetic deflection in mass spectrometry |
| magnetic equivalence |
magnetic field
( )
scan in mass spectrometry |
magnetic field strength,
quantity |
magnetic flux,
quantity |
| magnetic flux density in Mössbauer spectroscopy |
magnetic flux density,  quantity |
| magnetic induction |
magnetic moment,
 ,
quantity |
| magnetic resonance imaging (MRI) |
| magnetic susceptibilityquantity |
magnetic susceptibility,
quantity |
| magnetic transition |
magnetizability,
quantity |
| magnetization transfer |
magnetogyric ratio,
quantity |
| main chain (backbone) of a polymer |
| main-chain polymer liquid crystal |
| mancude-ring systems |
| mancunide-ring systems |
| manipulator |
| manual in analysis |
| mapping in biotechnology |
| Marangoni effect |
| Marcus–Coltrin path |
| Marcus equation |
| Marcus–Hush relationship |
| Marcus inverted region (for electron transfer) |
| marker |
| Mark–Houwink equation |
| Markownikoff rule |
| martensitic transition |
mass distribution ratio, 
in micro-emulsion electrokinetic chromatographyquantity |
mass distribution ratio,
in micellar electrokinetic chromatographyquantity |
mass,  quantity |
| mass analysis in mass spectrometry |
| mass-average velocity in electrolytes |
| mass balance in atmospheric chemistry |
mass concentration,
 ,
quantity |
| mass density |
mass density gradient,
 ,
|
| mass-distribution function |
| mass distribution ratio |
| mass distribution ratio in chromatography |
mass excess,
quantity |
mass flow rate,
quantity |
| mass-flow sensitive detector in chromatography |
mass fraction,
quantity |
| massic |
| massive transition |
| mass-law effect |
mass number,
quantity |
mass (weight) of the stationary phase,
in chromatography |
| mass peak in mass spectrometry |
| mass range in mass spectrometry |
| mass resolving power in mass spectrometry |
| mass spectrograph |
| mass spectrometer |
| mass spectrometer (operating on the linear accelerator
principle)
|
| mass spectrometer focusing system (deflection
system)
|
| mass spectrometric detector in gas chromatography |
| mass spectrometry |
| mass spectroscope |
| mass spectroscopy |
| mass spectrum |
 mass spectrum |
mass-to-charge ratio,
in mass spectrometry |
| mass transfer in biotechnology |
| mass transfer coefficient in electrochemistry |
| mass-transfer-controlled electrolyte rate constant |
| matched cells in spectrochemical analysis |
| material safety data sheet (MSDS) |
| matrix in analysis |
| matrix effect |
| matrix isolation |
| Mattauch–Herzog geometry |
| maximum allowable concentration
in atmospheric chemistry |
| maximum emission concentration
in atmospheric chemistry |
| maximum latent period |
| maximum loading |
| maximum permissible daily dose |
| maximum permissible level (MPL) |
| maximum storage life |
| maximum tolerable concentration (MTC) |
| maximum tolerable dose (MTD) |
| maximum tolerable exposure level (MTEL) |
| maximum tolerated dose (MTD) |
| McLafferty rearrangement in mass spectrometry |
mean (average),
|
| mean activity of an electrolyte in solution |
mean catalytic activity rate,
 |
| mean current density |
| mean exchange current density |
mean free path,
quantity |
| mean interstitial velocity of the carrier gas
in chromatography |
mean life,
|
mean lifetime,
|
| mean linear range in nuclear chemistry |
| mean mass range in nuclear chemistry |
mean mass rate,
|
| mean residence time of adsorbed molecules |
mean substance rate,
|
mean volume rate,
|
| measurable quantity |
| measurand |
| measured excitation spectrum |
| measured spectrum |
| measured value in analysis |
| measurement |
| measurement resolution
in atmospheric trace component analysis |
| measurement result |
| measurement solution in analysis |
| measurement threshold of an analyser |
| mechanical entrapment |
| mechanical hygrometer |
| mechanical inhibitor in catalysis |
| mechanization in analysis |
| mechanism of a reaction |
| mechanism-based inhibition |
| median |
median effective concentration
( )quantity |
median effective dose
( )quantity |
median lethal concentration
( )quantity |
median lethal dose
( )quantity |
median lethal time
( )quantity |
median narcotic concentration
( )quantity |
median narcotic dose
( )quantity |
| medium |
| medium effect |
| medium-pressure mercury lamp (arc) |
| megaSI unit prefix |
| meiosis |
| Meisenheimer adduct |
| Meker burner |
| melting |
| melting point (corrected/uncorrected) |
| membrane |
| membrane in an ion-selective electrode |
| membrane emf |
| membrane potential |
| membrane sites
in an ion-selective electrode |
| memory effect in atmospheric chemistry |
| mer- in inorganic nomenclature |
| mer in polymer chemistry |
| mercaptals |
| mercaptans |
| mercaptides |
| mercaptoles |
| mercury flow system in spectrochemical analysis |
| mercury–xenon lamp (arc) |
| mero |
| merry-go-round reactor (turntable reactor) |
| meso |
| meso-compound |
| mesogen |
| mesogenic group |
| mesogenic monomer |
| mesogenic pitch |
| mesoionic compounds |
| mesolytic cleavage |
| mesomeric effect |
| mesomerism |
| mesomorphic phase |
| mesomorphic state |
| mesomorphic transition |
| mesopause in atmospheric chemistry |
| mesophase (1994, 66, 1139) |
| mesophase (2002, 74, 495) |
| mesophase pitch |
| mesophase pitch-based carbon fibres |
| mesophiles |
| mesopore in catalysis |
| mesoscale |
| mesosphere |
| meso structures in polymers |
| messenger RNA (mRNA) |
| metabolic half-life (metabolic half-time) |
| metabolism |
| metabolite |
| metal–carbene complexes |
| metal–carbyne complexes |
| metal distribution |
| metal–insulator transition |
| metallacycloalkanes |
| metallocenes |
| metalloenzyme |
| metallurgical coke |
| metal–nonmetal transition |
| metal to ligand charge transfer (MLCT) transition |
| metal to metal charge transfer (MMCT) transition |
| metamagnetic transition |
| metastability of a phase |
| metastable |
| metastable film |
| metastable ion in mass spectrometry |
| metastable state in nuclear chemistry |
| metastable state in spectrochemistry |
| metatectoid reaction |
| metathesis |
| methanogens |
| method of isotopic perturbation |
| methylene |
| methylidyne |
| methylotrophic microorganisms |
| metreunit |
| micellar catalysis |
| micellar mass |
| micellar solubilization |
| micellar weight |
| micelle |
| micelle charge |
Michaelis constant,
|
| Michaelis–Menten kinetics |
| Michaelis–Menten mechanism |
| microSI unit prefix |
| microbial leaching |
| microcanonical rate constant |
| microcanonical variational transition-state theory
(µVTST)
|
| microcarrier in biotechnology |
| microclimatology |
| microelectrophoresis |
| microfiltration |
| microgel |
| microheterogeneity in biochemistry |
| micrometeorology |
| micro-network |
| microphotometer |
| micropore in catalysis |
| micropore filling in catalysis |
| micropore volume in catalysis |
| microporous carbon |
| microscopic chemical event |
microscopic cross-section,
quantity |
| microscopic diffusion control (encounter control) |
| microscopic electrophoresis |
| microscopic film |
| microscopic kinetics |
| microscopic reversibility at equilibrium |
| microsome |
| middle atmosphere |
| Mie scattering |
| migration |
| migration current |
migration time of micelles,  in micellar electrokinetic chromatographyquantity |
migration time,  in capillary electrophoresisquantity |
| migratory aptitude |
| migratory insertion |
| milliSI unit prefix |
| milligram equivalent of readability
of a precision balance |
| millimetre of mercuryunit |
| milling (grinding) |
minimum consumption time,
in flame emission and absorption spectrometryquantity |
| minimum density of states criterion |
| minimum-energy reaction path |
minimum lethal concentration
( )
quantity |
minimum lethal dose
( )
quantity |
| minus |
|
minute
of arcunit |
| mist in atmospheric chemistry |
| mitochondria |
| mitosis |
| mixed control |
| mixed crystal (solid solution) |
| mixed energy release |
| mixed indicator |
| mixed labelled |
| mixed potential |
| mixing in analytical chemistry |
| mixing control |
| mixing height in atmospheric chemistry |
| mixing ratio in atmospheric chemistry |
| mixture |
| MLCT |
| mobile adsorption |
| mobile phase in chromatography |
mobile-phase velocity,
in chromatography |
mobility,
quantity |
| mobility (general)quantity |
| mobility in aerosol physics |
| Möbius aromaticity |
| mode |
| mode-locked laser |
| moderation in nuclear chemistry |
| moderator |
| modified active solid in chromatography |
| modified Arrhenius equation |
| modified sample |
| modifier in solvent extraction |
modulus of elasticity (Young's modulus),
quantity |
| Mohr amplification process in analysis |
| moiety |
| MOL file format |
| molal |
molality,
 ,
quantity |
| molar |
| molar absorption coefficient |
| molar absorptivity |
| molar activity in radiochemistry |
| molar average velocity in electrolytes |
| molar conductivity |
| molarity |
| molar-mass exclusion limit
in polymers |
molar refraction,
quantity |
|
mole
unit |
| molecular anion |
| molecular beams |
| molecular cation |
| molecular conformation of a polymer |
| molecular connectivity index |
| molecular design |
| molecular dynamics |
| molecular dynamics in drug design |
| molecular entity |
| molecular formula |
| molecular graphics |
| molecular ion in mass spectrometry |
| molecular modeling |
| molecular shape |
| molecularity |
| molecular kinetics |
| molecular laser |
| molecular mechanics calculation |
| molecular metal |
| molecular nucleation in polymers |
| molecular orbital |
| molecular rearrangement |
| molecular sieve effect |
| molecular spectra |
| molecular weight |
| molecular-weight exclusion limit in polymers |
| molecule |
| mole fraction |
| molfile |
| molozonides |
moment of a force,
quantity |
moment of inertia,
 ,
quantity |
momentum,
quantity |
| momentum spectrum |
| monitoring |
| monochromator |
| monoclonal antibodies (MAbs) |
| monodisperse medium |
| monodisperse polymer |
| mono-energetic radiation |
| monoisotopic mass spectrum |
| monolayer |
| monolayer capacity |
| monomer |
| monomeric unit (monomer unit, mer) |
| monomer molecule |
| monomer unit |
| monosaccharides |
| monotectic reaction |
| monotectoid reaction |
| monotectoid temperature |
| monoterpenes |
| monoterpenoids |
| monothioacetals |
| monotropic transition |
| Monte Carlo study |
| mordant |
| More O'Ferrall–Jencks diagram |
| Morin transition |
| morphotropic transition |
| Mössbauer effect |
| Mössbauer thickness
in Mössbauer spectroscopy |
| most probable distribution (in macromolecular
assemblies)
|
| Mott–Hubbard transition |
| Mott transition |
| MPP-based carbon fibres |
| mucopolysaccharides |
| multi-centre bond |
| multi-centre reaction |
| multi-channel pulse height analyser |
| multident |
| multienzyme |
| multienzyme complex |
| multienzyme polypeptide |
| multilayer |
| multilayer adsorption |
| multilayer aggregate in polymer crystals |
| multiphoton absorption |
| multiphoton ionization in mass spectrometry |
| multiphoton process |
| multiple ionization satellite
in X-ray spectroscopy |
| multiple-pass cell in spectrochemical analysis |
| multiple peak scanning in mass spectrometry |
| multiple scattering |
| multiplex spectrometer |
| multiplicative name |
| multiplicity (spin multiplicity) |
| multiply labelled |
| multipole line
in X-ray spectroscopy |
| multistage sampling |
| multi-strand chain in polymers |
| multi-strand macromolecule |
| multivariate statistics |
| munchnones |
| muonium |
| mustard oils |
| mustards |
| mutagen |
| mutagenesis |
| mutarotation |
| mutation |
| mutation rate in biotechnology |
mutual inductance,
quantity |
| Myelin cylinders |
| n → π* state |
| n → π* transition |
| n-σ*
delocalization (or n-σ* no bond
resonance)
|
| n → σ* transition |
| nanoSI unit prefix |
| nanofiltration |
| nanoscopic film |
| naphthenes |
| naphthenic acids |
| narcissistic reaction |
| natural broadening of a spectral line |
| natural graphite |
| natural isotopic abundance |
| natural lifetime |
| natural radiation |
| natural radioactivity |
| neat soap |
| necrosis |
| needle coke |
| negative adsorption |
| negative feedback |
| negative ion in mass spectrometry |
| negaton |
| neighbouring group participation |
| nematic phase |
| nematic state |
| neodymium laser |
| neoflavonoids |
| neolignans |
|
neper
unit |
| nephelometry |
| Nernst's diffusion layer |
| net in surface chemistry |
| net current |
net electric charge,
of a particle in electrophoresis |
| network in polymer chemistry |
| network polymer |
| neutral-density filter |
| neutrino (electron neutrino) |
| neutron |
| neutron density |
| neutron multiplication |
neutron number,
quantity |
| neutron rest massconstant |
| neutron temperature |
| neutrophilic organisms |
| Newman projection |
|
newton
unit |
| Newton black film |
| Newton diagram |
| Newtonian fluid |
| NHOMO |
| nido- |
| Nier–Johnson geometry |
| NIH shift |
| nimbostratus cloud in atmospheric chemistry |
| nitramines |
| nitrenes |
| nitrenium ions |
| nitrification |
| nitrile imides |
| nitrile imines |
| nitrile oxides |
| nitriles |
| nitrile sulfides |
| nitrile ylides |
| nitrilimines |
| nitrilium betaines |
| nitrilium ions |
| nitrimines |
| nitro compounds |
| nitrogen fixation |
| nitrogen laser |
| nitrogen mustards |
| nitrogen ylides |
| nitrolic acids |
| nitrones |
| nitronic acids |
| nitrosamides |
| nitrosamines |
| nitrosimines |
| nitroso compounds |
| nitrosolic acids |
| nitroxides |
| nitroxyl radicals |
| no-bond resonance |
| no carrier added |
| no observed adverse effect level (NOAEL) |
| noise |
| no-load indication (for a precision balance) |
nominal linear flow,
in chromatographyquantity |
| nominally labelled tracer |
| nonadiabatic |
| nonadiabatic coupling |
| nonadiabatic electron transfer |
| nonadiabatic photoreaction |
| nonbonded interactions |
| non-calorimetric thermophysical measurements |
| nonclassical carbocation |
| non-coherent source in spectrochemistry |
| non-crystalline electrodes |
| non-destructive activation analysis |
| non-diagram line in X-ray spectroscopy |
| non-dissociative chemisorption |
| non-draining |
| non-equilibrium reaction |
| non-graphitic carbon |
| non-graphitizable carbon |
| non-ideal chromatography |
| non-ideal, linear chromatography |
| non-ideal, non-linear chromatography |
| non-isotopic labelling |
| non-linear chromatography |
| non-linear distribution isotherm in chromatography |
| non-linearity error in spectrochemical analysis |
| non-linear optical effect |
| non-localized adsorption |
| non-polarized interphases |
| non-radiative decay |
| nonselective detector |
| nonselectively labelled |
| nonselective quantum counter |
| non-specific adsorption |
| non-uniform corrosion |
| non-uniform polymer |
| non-vertical energy transfer |
| no-observed-adverse-effect-level (NOAEL)replaced |
| no-observed-effect-level (NOEL) |
| nor- |
| normal |
| normal distribution |
| normal kinetic isotope effect |
| normal-phase chromatography |
| normal region (for electron transfer) |
normal stress,
quantity |
| normal X-ray level |
| Norrish type II photoreaction |
| Norrish Type I photoreaction |
| n-star macromolecule |
| n-strand chain |
| n-strand molecule |
| N-terminal residue in a polypeptide |
 th order phase transition |
| nuclear atom |
| nuclear chemistry |
| nuclear decay |
| nuclear disintegration |
| nuclear fission |
| nuclear fuel |
| nuclear fusion |
| nuclear fusion reaction |
| nuclear graphite |
| nuclear isomers |
| nuclear level |
| nuclear magnetonconstant |
| nuclear particle |
| nuclear quadrupole moment (spectroscopic) |
| nuclear reactor |
| nuclear transformation |
| nuclear transition |
| nuclearity |
| nucleating agent |
| nucleation in colloid chemistry |
| nucleation and growth |
| nucleic acids |
| nucleofuge |
| nucleon |
| nucleon number |
| nucleophile (nucleophilic) |
| nucleophilic catalysis |
| nucleophilicity |
| nucleoproteins |
| nucleosides |
| nucleotide bases |
| nucleotides |
| nucleus |
| nuclide |
| nuclidic mass |
| nuisance threshold in atmospheric chemistry |
number concentration,  ,  quantity |
number content,
 |
number density,
quantity |
| number-distribution function |
number flow rate,
quantity |
| number fraction |
number of entities,  quantity |
| number of moles |
| number of theoretical plates |
| numerical value of a quantity |
observation height,
in flame emission and absorption spectrometry |
observation pathlength,
in flame emission and absorption spectrometry |
| observation space
in flame emission and absorption spectrometry |
observation volume,
in flame emission and absorption spectrometry |
| observed rate coefficient |
| occlusion (molecular) |
| octahedro- in inorganic nomenclature |
| odd-electron ion |
| ODMR (Optically Detected Magnetic Resonance) |
| odour threshold in atmospheric chemistry |
|
ohm
unit |
| olefins |
| oligo |
| oligomer |
| oligomeric |
| oligomerization |
| oligomer molecule |
| oligonucleotides |
| oligopeptides |
| oligosaccharides |
| one-colour indicator |
| onium compounds |
| open atomizer |
| open dynamic system in spectrochemical analysis |
| open film |
| open hearth furnace in atmospheric chemistry |
| open static system in spectrochemical analysis |
| open-tubular column in chromatography |
| operational pH cell |
| operational pH standard |
| operator gene |
| operon |
| opposing reactions |
| optical activity |
| optical antipodes |
| optical-beam error in spectrochemical analysis |
| optical density |
| optical filter |
| optical isomers |
| optically labile |
| optical purity |
| optical resolution |
| optical rotation |
| optical rotatory power |
| optical spectroscopy |
| optical yield |
| optoacoustic spectroscopy |
| orbital |
| orbital energy |
| orbital steering |
| orbital symmetry |
| order-disorder transition |
order of reaction,
quantity |
| order parameter |
| organelles |
| organic dye laser |
| organo- |
| organoheteryl groups |
| organometallic compounds |
| organyl groups |
| origin of replication (ori) |
| ortho acids |
| ortho amides |
| ortho- and peri-fused (polycyclic compounds) |
| ortho esters |
| ortho-fused (polycyclic compounds) |
| orthokinetic aggregation in colloids |
| osazones |
| oscillating reaction |
oscillator strength,
|
osmolality,  quantity |
| osmolarity |
osmotic coefficient,
quantity |
osmotic concentration,  quantity |
osmotic pressure,
quantity |
| osones |
| osotriazoles |
| Ostwald ripening |
outer electric potential,
quantity |
| outer Helmholtz plane (OHP) |
| outer-sphere electron transfer |
| outgassing of a catalyst |
| out-isomer |
| out-of-plane bending coordinate
in molecular geometry |
| output rate |
| overall activation energy |
overlap integral,
|
overpotential,
quantity |
| oxa-di-π-methane rearrangement |
| oxenium ions |
| oxidant in atmospheric chemistry |
| oxidation |
| oxidation number |
| oxidation–reduction (redox) titration |
| oxidation state |
| oxidative addition |
| oxidative coupling |
| oxidized species |
| oxidoreductases |
| oxime O-ethers |
| oximes |
| oxo acids |
| oxoacids |
| oxocarbons |
| oxo carboxylic acids |
| oxo compounds |
| oxonium ions |
| oxonium ylides |
| oxyacid (oxy-acid) |
| oxygen-flask combustion
in spectrochemical analysis |
| oxylium ions |
| ozone hole |
| ozonides |
| π – π* state |
| π → π* transition |
| π → σ* transition |
| π-adduct |
| π-bond |
| π-complex |
| π-electron acceptor/donor group |
|
P, M
|
| packed column in chromatography |
| packing in column chromatography |
| paddlanes |
| pair attenuation coefficient in nuclear chemistry |
pair correlation length,
in thin filmsquantity |
| pair production in nuclear chemistry |
| Pallmann effect |
| PAN-based carbon fibres |
| paraffin |
| parallel-chain crystal in polymers |
| parallel reactions |
| paramagnetic |
| parent hydride |
| parent ion in mass spectrometry |
| partial anodic (cathodic) current |
| partial charge exchange reaction |
| partial charge transfer reaction |
| partial decay constant in nuclear chemistry |
| partial digestion in spectrochemical analysis |
| partial isotherm (or individual isotherm)
in surface chemistry |
| partial kinetic current in electrochemistry |
| partial least squares (PLS) |
| partially draining |
partial mass density,
quantity |
| partial microscopic diffusion control (encounter
control)
|
| partial molar Gibbs energy |
| partial molar quantity |
| partial order of reaction |
| partial pressure |
| partial rate factor |
partial specific volume,
|
| particle concentration in atmospheric chemistry |
| particle density in nuclear chemistry |
| particle induced X-ray emission analysis |
| particle scattering factor |
| particle scattering function |
| particle size in atmospheric chemistry |
| particle size distribution
in atmospheric chemistry |
| particular property |
| particulate carbon |
| particulate matter in atmospheric chemistry |
| partition |
| partition chromatography |
| partition coefficient |
partition constant,
quantity |
| partition function |
| partition isotherm in chromatography |
partition ratio,
quantity |
| partly open film |
|
pascal
unit |
| passivation in electrochemical corrosion |
| passivation potential in electrochemical corrosion |
| passive metal |
| passive sampler |
| passive state in electrochemical corrosion |
| Paterno–Büchi reaction |
| pattern recognition |
| paucidisperse system |
| PDMR |
| peak in chromatography |
| peak analysis |
| peak area in chromatography |
| peak area method |
| peak base in chromatography |
| peak concentration (trace atmospheric component) |
| peak current |
peak elution volume (time),
 ,
in column chromatography |
| peak enthalpimetry |
| peak fitting |
| peak height in chromatography |
| peak maximum in chromatography |
| peak potential |
peak resolution,
in chromatographyquantity |
| peak widths in chromatography |
| pectins |
| Peierls transition |
| pellicular packing in chromatography |
| penams |
| pendant chain |
| pendant group (side group) |
| penems |
| penetrant (permeant) |
| penetration depth |
| penicillins |
| Penning gas mixture |
| pentads in polymers |
| pentaprismo- |
| peptides |
| peptidoglycan |
| peptization in colloid chemistry |
| per acids |
| percent |
| percentage error |
| percentage exposed in metallic catalysts |
percentage relative error,
(%)
|
percentage standard deviation,
 (%),
 (%)
|
| percent diastereoisomer excess |
| percent enantiomer excess |
| perfectly polarized interphase |
| perfusion stationary phase (material) in liquid chromatography |
| pericyclic reaction |
| perikinetic aggregation in colloids |
period,
quantity |
| periodic copolymer |
| periodic copolymerization |
| periodic voltage |
| peripheral atom in organic reaction mechanisms |
| periplanar |
| periselectivity |
| peritectic reaction |
| peritectoid reaction |
| peritectoid temperature |
permeability,
quantity |
permeability of vacuum,
constant |
| permeate |
| permeation chromatography |
| permeation tube |
permittivity,
quantity |
| permittivity of vacuumconstant |
| permselectivity |
| peroxides |
| peroxisome |
| peroxo compounds |
| peroxy acids |
| perpendicular effect |
| persistence length in polymers |
| persistent |
| perspective formula |
| perstraction |
| perturbed dimensions in polymers |
| pervaporation |
| pesticide |
| pesticide residue |
| petaSI unit prefix |
| petroleum coke |
| petroleum pitch |
| pH |
| pH0.5 or pH1/2 in solvent extraction |
| pharmacodynamics |
| pharmacokinetics (2004, 76, 1064) |
| pharmacokinetics (1993, 65, 2082)replaced |
| phase |
| phase fluorimetry |
| phase I reaction of biotransformation |
| phase II reaction of biotransformation |
| phase inversion |
phase ratio,
in chromatographyquantity |
phase ratio,
in liquid-liquid distributionquantity |
| phase rule |
| phase separation |
| phase-space theory |
| phase-transfer catalysis |
| phase transition |
| phenolates |
| phenols |
| phenomenological equation |
| phenonium ions |
| phenotype |
| phenoxides |
| pheromone |
| pH glass electrode |
| pH gradient in electrophoresis |
| phonon |
| phosphanes |
| phosphanylidenes |
| phosphatidic acids |
| phosphazenes |
| phosphine oxides |
| phosphines |
| phosphinic acids |
| phosphinidenes |
| phosphinous acids |
| phospho |
| phosphoglycerides |
| phospholipids |
| phosphonic acids |
| phosphonitriles |
| phosphonium compounds |
| phosphonium ylides |
| phosphono |
| phosphonous acids |
| phosphoramides |
| phosphoranes |
| phosphoranyl radicals |
| phosphorescence |
| phosphorimetry |
| phosphoroscope |
| phosphorus ylides |
| phosphorylation |
| phosphylenes |
| photoacoustic detector |
| photoacoustic effect |
| photoacoustic spectroscopy |
| photoadsorption |
| photoaffinity labelling |
| photoassisted catalysis |
| photocatalysis |
| photocatalytic cell |
| photochemical detector |
| photochemical equivalence |
| photochemical hole burning |
| photochemical reaction |
| photochemical smog |
| photochemical yield |
| photochemistry |
| photochromism |
| photoconductive detector |
| photoconductivity |
| photocrosslinking |
| photocuring |
| photocurrent yield |
| photodegradation |
| photodesorption |
| photodetachment of electrons |
| photodiode |
| photodiode array |
| photodynamic effect |
| photoelectrical effect |
| photoelectric attenuation coefficient |
| photoelectric detector |
| photoelectric peak |
| photoelectrochemical cell |
| photoelectrochemical etching |
| photoelectrochemistry |
| photoelectrolytic cell |
| photoelectron spectroscopy (PES) |
| photoelectron yield |
| photoemissive detector |
| photoexcitation |
| photo-Fries rearrangement |
| photogalvanic cell |
| photoimaging |
| photoinduced electron transfer |
| photoinduced polymerization |
| photoinitiation |
| photoionization |
| photoionization detector in gas chromatography |
| photoisomerization |
| photoluminescence |
| photolysis |
| photometry |
| photomultiplier tube |
| photon |
| photon activation |
| photon counting |
| photon emittance |
photon exitance,
quantity |
photon exposure,
quantity |
photon flow,
quantity |
photon fluence,
quantity |
photon fluence rate,
quantity |
| photon flux |
photon irradiance,
quantity |
| photon quantities |
photon radiance,
quantity |
| photooxidation |
| photooxygenation |
| photopeak |
| photophoresis |
| photophosphorylation |
| photophysical processes |
| photopolymerization |
| photoreaction |
| photoreduction |
| photoresist |
| photosensitization |
| photosensitizer |
| photostationary state |
| photosynthesis |
| photosystem |
| photothermal effect |
| photothermography |
| phototransistor |
| photovoltaic cell |
| pH-rate profile |
| pH standard |
| phthaleins |
| phthalides |
| physical adsorption |
| physical network |
| physical quantity (measurable quantity) |
| physisorption (physical adsorption) |
| phytotoxicant |
| picoSI unit prefix |
| picrates |
| piezoluminescence |
| pile-up in radioanalytical chemistry |
| pinacols |
| PIN (p-intrinsic-n) diode |
| PIN semiconductor detector |
| pinocytosis |
| pitch |
| pitch-based carbon fibres |
| pitting corrosion |
| Pitzer strain |
| planar chirality |
| planar chromatography |
| planar film |
| planar stereoisomerism |
| Planck constant |
| plane angle |
| plasma in biology |
| plasma in spectrochemistry |
| plasma desorption ionization in mass spectrometry |
| plasmid |
| plastic flow |
| plastic transition |
| plateau border in surface chemistry |
plate height,
in chromatography |
plate number,
in chromatographyquantity |
| pleiotropic gene |
| ploidy |
| plug-flow in catalysis |
| plumbylenes |
| plumbylidenes |
| plume in atmospheric chemistry |
| plus, minus |
| pneumatic detector |
| point group |
| point of zero charge (p.z.c.) |
|
poise
unit |
| poison in catalysis |
| Poisson distribution |
| polar aprotic solvent |
| polar effect |
| polarity |
| polarizabilityquantity |
| polarization |
polarization,
in electrochemistryquantity |
| polarization error in spectrochemical analysis |
| polarized interphases |
| polarography |
| polar solvent |
| pollution (pollutant) |
| pollution rose |
| polyaddition |
| polychromator |
| polycondensation |
| polycrystalline graphite |
| polycyclic system |
| polydent |
| polydisperse medium |
| polydisperse polymer |
| polyelectrolyte |
| polyfunctional catalysis |
| polygranular carbon |
| polygranular graphite |
| polyhedral symbol |
| polyhedranes |
| polyions |
| polyketides |
| polymer |
| polymer blend |
| polymer crystal |
| polymer crystallite |
| polymerase chain reaction (PCR) |
| polymeric |
| polymeric stationary phase (material) in liquid chromatography |
| polymerization |
| polymer molecule |
| polymer network |
| polymer–polymer complex |
| polymer-poor phase |
| polymer-rich phase |
| polymer–solvent interaction |
| polymolecularity correction |
| polymorphic transition |
| polypeptides |
| polyprenols |
| polyquinanes (polyquinenes) |
| polysaccharides |
| polysulfanes |
| polysulfides |
| polytopal rearrangement |
| polytypic transition |
| pooled relative standard deviation |
| pooled standard deviation |
| population inversion |
| pore size distribution |
| Porod–Kratky chain in polymers |
| porosity |
| porous-layer open-tabular (PLOT) column
in chromatography |
| porphyrinogens |
| porphyrins |
| position-sensitive photomultiplier tube |
| positive feedback |
| positive ion in mass spectrometry |
| positron |
| positronium |
| post-column derivatization in chromatography |
| post-filter effect in luminescence spectroscopy |
| postprecipitation |
| potential at the point of zero charge (p.z.c.) |
| potential-determining (p.d.) ions |
potential energy,
 ,
quantity |
| potential-energy profile |
| potential-energy (reaction) surface |
| potential of a cell reaction |
| potential temperature |
| potentiation |
| potentiometer |
| potentiometric detection method
in electrochemical analysis |
| potentiometric selectivity coefficient |
power,
quantity |
| power level |
| pre-association |
| precipitation |
| precipitation fractionation of polymers |
| precipitation from homogeneous solution
(pfhs)
in analysis |
| precipitation titration |
| precision |
| precision of a balance |
| precision of a weighing |
| precision of indication of a balance |
| preconcentration in trace analysis |
| preconcentration coefficient
of a desired microcomponent in trace analysis |
| precursor in radioanalytical chemistry |
| precursor complex |
| precursor ion in mass spectrometry |
| predissociation |
| pre-equilibrium in solvent extraction |
| pre-equilibrium (prior equilibrium) |
pre-exponential factor,
quantity |
| preferential sorption in polymers |
| pre-filter effect in luminescence spectroscopy |
| premium coke |
| premix burner in flame spectroscopy |
| prenols |
| pre-polymer |
| pre-polymer molecule |
pressure,  quantity |
| pressure flow |
| pressure gradient correction factor
in gas chromatography |
| pressure-induced transition |
| pressure jump |
| pressure-sensitive detector |
| pretreatment of a catalyst |
| primary crystallization |
| primary current distribution |
| primary electrons (pe)
in in situ microanalysis |
| primary excitation of X-rays |
| primary isotope effect |
| primary kinetic electrolyte effect |
| primary kinetic isotope effect |
| primary mixture |
| primary particle in catalysis |
| primary photochemical process (primary
photoreaction)
|
| primary pH standards |
| primary pollutant in atmospheric chemistry |
| primary (photo)process |
| primary (photo)product |
| primary sample |
| primary standard |
| primary structure |
| primary structure
of a segment of a polypeptide |
| primitive change |
| principal group |
| principal ion in mass spectrometry |
| principal moments of inertia |
| principle of least nuclear motion |
| principle of microscopic reversibility |
| principle of minimum structural change |
prior distribution,
|
| prior equilibrium |
| priority |
probability,
|
probability density,  |
| probe in biotechnology |
| process |
| prochirality |
| prochirality centre |
| product |
| product-determining step |
| product development control |
| product ion |
productivity,
in biotechnologyquantity |
| product state distribution |
| pro-E, pro-Z |
| progenitor ion in mass spectrometry |
| program |
| programmed-flow chromatography (flow programming) |
| programmed-pressure chromatography (pressure
programming)
|
| programmed-temperature chromatography (temperature
programming)
|
| projection formula |
| prolate trochoidal mass spectrometer |
| promoter (gene technology) |
| promoter in catalysis |
| promotion |
| prompt coincidence |
| prompt neutrons |
| propagating reaction |
| propagation |
| propellanes |
| property |
| prophage |
| proportional counter |
| proportional counter tube |
| proportional gas-scintillation counter |
| proprochirality |
| pro-R, pro-S |
| pros in histidine nomenclature |
| prostaglandins |
| prostanoids |
| prosthetic group |
| proteases |
| protected lyophobic colloid |
| protective action in colloid chemistry |
| protein engineering |
| proteins |
| proteoglycan |
| proteome |
| protic |
| protide |
| protio |
| protium |
| protogenic (solvent) |
| protolysis |
| proton |
| proton affinity |
| protonated molecule in mass spectrometry |
| protonation constant |
| proton charge |
| proton magnetic momentconstant |
| proton magnetogyric ratio |
| proton number |
| proton rest massconstant |
| proton transfer reaction |
| protophilic (solvent) |
| protoplast |
| prototrophs |
| prototropic rearrangement (or prototropy) |
| pseudo acids |
| pseudo-asymmetric carbon atom |
| pseudo-axial |
| pseudo bases |
| pseudo-catalysis |
| pseudo-co-oligomer |
| pseudo-copolymer |
| pseudo-equatorial |
| pseudo-first-order rate coefficient |
| pseudo-first-order reaction |
| pseudohalogens |
| pseudomolecular rearrangement |
| pseudopericyclic |
| pseudo rate constant |
| pseudorotation |
| pseudo-unimolecular |
| pseudoureas |
| pseudo-zero-order reaction |
| psychosine |
| psychrometric hygrometer |
| psychrometry |
| puffing |
| puffing inhibitor |
| pulsatance |
| pulse amplitude analyser |
| pulse amplitude selector |
| pulse duration in electroanalytical chemistry |
| pulse height analyser |
| pulse reactor in catalysis |
| pump-probe technique |
| purine bases |
| pyramidal inversion |
| pyranoses |
| pyrimidine bases |
| pyro |
| pyroelectric detector |
| pyrolysis |
| pyrolysis-gas chromatography |
| pyrolytic carbon |
| pyrolytic graphite |
| pyrromethenes |
| QSAR |
| Q-switched laser |
quadratic mean,
|
| quadro- |
| quadrupole ion storage trap (Quistor) |
| quadrupole mass analyser |
| quadrupole splitting in Mössbauer spectroscopy |
| qualitative analysis |
| qualitative elemental specificity in analysis |
| quality assurance |
| quality control |
| quality factor in nuclear analytical chemistry |
| quality of solvent in polymer chemistry |
| quantized internal energy |
| quantitative analysis |
| quantitative structure–activity relationships (QSAR) |
| quantitative structure–activity relationship (QSAR) in drug design |
| quantity |
| quantity calculus |
| quantity of dimension one (dimensionless quantity) |
| quantum of radiation |
| quantum counter |
| quantum efficiency |
| quantum-mechanical tunnelling |
| quantum well multilayer |
quantum yield,
quantity |
| quarter-transition-time potential |
| quartet state |
| quartz–iodine lamp |
| quasi-axial |
| quasi-classical trajectory (QCT) method |
| quasi-enantiomers |
| quasi-equatorial |
| quasi-equilibrium |
| quasi-molecular ion in mass spectrometry |
| quasi-racemic compound |
| quasi-single-strand polymer |
| quaternary ammonium compounds |
| quaternary structure |
| quaterpolymer |
| quencher |
| quenching |
| quenching constant in photochemistry |
| quenching correction in photochemistry |
| quinarenes |
| quinhydrones |
| quinomethanes |
| quinomethides (quinone methides) |
| quinone diazides |
| quinones |
| quinonimines (quinone imines) |
| quinonoximes |
| Quistor |
| ρ-value (rho-value) |
| ρσ-equation (rho-sigma equation) |
value
in chromatography |
value in planar chromatographyquantity |
| rabbit |
| rac |
| racemate |
| racemic |
| racemic compound |
| racemic conglomerate |
| racemic mixture |
| racemization |
| racemo structures in polymers |
|
rad
unit |
| radial development |
| radial electrostatic field analyser
in mass spectrometry |
| radial elution (radial development) or circular elution
(circular development)
in planar chromatography |
|
radian
unit |
radiance,
quantity |
| radiant emittance |
radiant energy,
quantity |
radiant energy density,
 ,
quantity |
radiant exitance,
quantity |
radiant exposure,
quantity |
| radiant flux |
radiant (energy) flux,
 ,
quantity |
| radiant intensity |
radiant power,
 ,
quantity |
| radiant quantities |
| radiation |
| radiation chemistry |
| radiation constants |
| radiation continuum in spectrochemistry |
| radiation counter |
| radiation detector |
| radiation hazard |
| radiationless deactivation (decay) |
| radiationless transition |
| radiation spectrum |
| radiative absorption in spectrochemistry |
| radiative capture |
| radiative de-excitation in spectrochemistry |
| radiative energy transfer |
radiative lifetime,
quantity |
| radiative transition |
| radical (free radical) |
| radical anion |
| radical cation |
| radical centre(s) |
| radical combination |
| radical copolymerization |
| radical disproportionation |
| radical ion |
| radical pair (geminate pair) |
| radical polymerization |
| radicofunctional name |
| radioactive |
| radioactive age |
| radioactive chain |
| radioactive contamination |
| radioactive cooling |
| radioactive dating |
| radioactive decay |
| radioactive equilibrium |
| radioactive fallout |
| radioactive half life |
| radioactive series |
| radioactive source |
| radioactive tracer |
| radioactive tracer technique in analysis |
| radioactive waste |
| radioactivity |
| radioanalytical chemistry |
| radiochemical activation analysis |
| radiochemical purification |
| radiochemical purity |
| radiochemical separation |
| radiochemical yield |
| radiochemistry |
| radiochromatograph |
| radiocolloid |
| radioenzymatic assay |
| radiograph |
| radiogravimetric analysis |
| radioimmunoassay |
| radioiodination |
| radioisotope |
| radioisotope dilution analysis |
| radioisotope induced X-ray emission analysis |
| radioluminescence |
| radiolysis |
| radiometric analysis |
| radiometric titration |
| radiometry |
| radionuclide |
| radionuclidic purity |
| radioreceptor assay |
| radiorelease analysis |
| radiosonde |
radius of gyration,
|
| raffinate |
| rain out in atmospheric chemistry |
| random coil in polymers |
| random coincidence in nuclear chemistry |
| random copolymer |
| random copolymerization |
| random error |
| random sample |
| range in analysis |
| range of measurement of an analyser |
| Raoult's law |
| rate |
| rate coefficient |
rate constant,
|
| rate-controlling step |
| rate-determining step (rate-limiting step) |
| rate law (empirical differential rate equation) |
| ratemeter in radiochemistry |
| rate of appearance |
| rate of change of a quantity |
| rate of change ratio |
rate of consumption,
or
|
rate of conversion,
quantity |
| rate of disappearance |
rate of fluid consumption,
in flame emission and absorption spectrometryquantity |
rate of formation,
or
|
| rate of liquid consumption in flame spectroscopy |
rate of migration,
in electrophoresis |
| rate of nucleation |
rate of reaction,  quantity |
| ratio |
| raw coke |
| Rayleigh ratio |
| Rayleigh scattering |
| rayon-based carbon fibres |
reactance,
quantity |
| reactant |
| reacting bond rules |
| reaction |
| reaction barrier |
| reaction chromatography |
| reaction coordinate |
reaction cross-section,
quantity |
| reaction dynamics |
| reaction intermediate |
| reaction mechanism |
| reaction path |
| reaction path degeneracy |
reaction probability,
|
| reaction stage |
| reaction step |
| reaction time |
| reactive (reactivity) |
| reactive adsorption |
| reactive complex |
| reactive desorption |
| reactive scattering |
| reactivity index |
| reactivity–selectivity principle (RSP) |
| readability of a balance |
| reading |
| reagent |
| real (electrified) interphase |
| real potential of a species in a phase |
| real surface (interface) area |
| rearrangement |
| rearrangement ion in mass spectrometry |
| rearrangement stage |
| rebound reaction |
| receptor (1992, 64, 164)replaced |
| receptor (2004, 76, 1067) |
| receptor in drug design |
| recognition site |
| recoil in radioanalytical chemistry |
| recoil-free fraction in Mössbauer spectrometry |
| recoil labelling |
| recombinant DNA technology |
| recombination fluorescence |
| reconstructive transition |
| recovery |
| recovery factor in an extraction process |
| recrystallization |
| redox ion exchangers |
| redox polymers |
| red shift |
| redox potential |
| reduced adsorption |
| reduced limiting sedimentation coefficient |
reduced mass,
quantity |
reduced mobile phase velocity,
 in chromatography |
| reduced osmotic pressure |
| reduced sample |
| reduced sedimentation coefficient |
| reduced species |
| reduced viscosity of a polymer |
| reducing in analytical chemistry |
| reduction |
| reductive elimination |
| reductones |
| re-extraction |
| referee sample |
| reference atom
in organic reaction mechanisms |
| reference cell (or blank cell)
in spectrochemical analysis |
| reference dose (RfD) |
| reference electrode |
| reference material |
| reference method |
| reference procedure
in analysis of trace air constituents |
| reference state of an element |
| reference value pH standard |
reflectance,
quantity |
| reflection electron energy loss spectroscopy (REELS) |
| reflection factor |
| reflection high energy electron diffraction (RHEED) |
| refraction effects |
refractive index,  quantity |
| refractive index increment in polymer chemistry |
| regeneration of a catalyst |
| regioselectivity (regioselective) |
| regresssion analysis |
| regular block in a polymer |
| regular coke |
| regular comb macromolecule |
| regular macromolecule |
| regular oligomer molecule |
| regular polymer |
| regular single-strand polymer |
| regular star macromolecule |
| regulator gene |
| Reissert compounds |
| rel |
| relative |
| relative activity |
| relative adsorption |
relative atomic mass (atomic weight),
quantity |
| relative biological effectiveness of radiation |
| relative configuration |
| relative counting in nuclear chemistry |
relative density,
quantity |
| relative detection limit |
| relative electrode potential |
| relative elongation |
| relative error |
| relative humidity |
| relative local current density |
| relative micellar mass |
| relative molar mass |
relative molecular mass,
quantity |
relative permeability,
quantity |
relative permittivity,
quantity |
| relative preconcentration in trace analysis |
| relative responsivity |
relative retardation,
in planar chromatographyquantity |
relative retention,
in column chromatographyquantity |
| relative selectivity in catalysis |
| relative spectral responsivity |
relative standard deviation,
 ,
|
| relative uncertainty |
| relative viscosity |
| relative viscosity increment |
| relative volumic mass |
| relaxation |
| relaxation kinetics |
| relaxation time |
| releaser in analytical flame spectroscopy |
|
rem
unit |
| Renner–Teller effect |
| reorganization in polymers |
reorganization energy,
quantity |
| repeatability |
| (chain) repeating distance |
| repeating distance |
| repetency |
| replacement name |
| replacement operation in organic nomenclature |
| replicate (duplicate) sample |
| replication |
| report in analysis |
| reprecipitation |
| representative sample |
| repression |
| reproducibility |
| repulsive potential-energy surface |
| reserve sample |
| Re, Si |
| residence time |
residence time (hydraulic retention time),
in biotechnologyquantity |
| residual current |
| residual fuel/oil |
| residual liquid junction (potential) error
in pH measurement |
| residual spectrum/background spectrum
in mass spectrometry |
resistance,
quantity |
resistivity,
quantity |
| resolution in gas chromatography |
| resolution in mass spectroscopy |
| resolution in optical spectroscopy |
| resolution in stereochemistry |
| resolving power in mass spectrometry |
resolving power,
in optical spectroscopyquantity |
| resolving time
in nuclear analytical chemistry |
| resolving time correction
in nuclear analytical chemistry |
| resonance |
| resonance absorption technique |
| resonance broadening of a spectral line |
| resonance cross-section
in Mössbauer spectrometry |
| resonance effect |
| resonance effect magnitude
in Mössbauer spectrometry |
| resonance emission |
| resonance energy |
| resonance energy in radiochemistry |
| resonance fluorescence |
| resonance fluorescence technique |
resonance integral,
|
| resonance integral in radiochemistry |
| resonance lamp |
| resonance line in photochemistry |
| resonance line in X-ray spectroscopy |
| resonance neutrons |
| resonance radiation |
| response constant in electroanalytical chemistry |
response time,
of a detectorquantity |
| response time of an analyser |
responsivity,
in detection of radiationquantity |
| rest point of a balance |
| restricted rotation |
| restriction enzymes |
| result in analysis |
retardation factor,
in column chromatographyquantity |
retardation factor,
in planar chromatographyquantity |
| retarder |
| retentate |
| retention in nuclear chemistry |
| retention efficiency in particle separation |
retention factor,
in column chromatographyquantity |
retention index,
in column chromatographyquantity |
| retention of configuration |
| retention temperature in chromatography |
| retention time in chromatography |
| retention volumes in chromatography |
| reticulation in catalysis |
| retinoids |
| retro |
| retroaddition |
| retrocycloaddition |
| retro-ene reaction |
| reverse osmosis |
| reversed direct-injection burner
in analytical flame spectroscopy |
| reversed (radiochemical) isotope dilution analysis |
| reversed-phase chromatography |
| reverse micelle (or reversed micelle) |
| reverse transcriptases |
| reversible transition |
| revolutions per minute
(rpm)
|
| rheology |
| rheopexy |
| rhodamine dyes |
| rhombohedral graphite |
| ribonucleic acids (RNA) |
| ribonucleotides |
| ribosomal RNA (rRNA) |
| ribosomes |
| Rice–Ramsperger–Kassel (RRK) theory |
| Rice–Ramsperger–Kassel–Marcus (RRKM) theory |
| riffling in analytical chemistry |
| rigid chain |
| ring assembly |
| Ringelmann chart in atmospheric chemistry |
| ring-opening copolymerization |
| ring-opening polymerization |
| ring reversal (ring inversion) |
| ring-sector |
| rise time of a radiation detector |
| rise time of an analyser |
(vertical) rise velocity,
in flame emission and absorption spectrometry |
| risk |
| risk assessment |
| risk estimation |
| Ritchie equation |
| RNA |
|
röntgen
unit |
root-mean-square end-to-end distance,
in polymers |
| Rosanoff convention |
| rotamer |
| rotational barrier |
| rotational constants |
| rotational diffusion |
| rotational diffusion coefficient |
rotational frequency,
in centrifugationquantity |
rotational term,
quantity |
| rotator phase transition |
| rotatory power |
| rotaxanes |
| rotenoids |
| rotometer in atmospheric chemistry |
| roughness factor (rugosity) of a surface |
| rovibronic state |
| rRNA |
| RS |
| R, S |
| r, s |
| R*, S* |
| Rp, Sp |
| rubredoxin |
| ruby laser |
| rupture of a thin film |
| Rutherford backscattering (RBS) |
| Rydberg constantconstant |
| Rydberg orbital |
| Rydberg transition |
| RYDMR |
| σ, π (sigma, pi) |
| σ → σ* transition |
| σ-adduct |
| σ-bond |
| σ-constant |
| σ-orbital |
| S |
| saccharides |
| Sackur–Tetrode constant |
| sacrificial acceptor |
| sacrificial donor |
| sacrificial hyperconjugation |
| saddle point |
| salt |
| salt effect |
| salt form of an ion exchanger |
| salting out |
| sample in analytical chemistry |
| sample error in spectrochemical analysis |
| sample handling in analysis |
| sample injector in chromatography |
| sampler |
| sample unit |
| sampling error |
| sampling interval in electroanalysis |
| sampling plan in analytical chemistry |
| sampling time in electroanalysis |
| sandwich compounds |
| sanitary land fill |
| saprophyte |
| saturated solution |
| saturation |
| saturation in radioanalytical chemistry |
| saturation activity |
| saturation capacity |
saturation fraction,
quantity |
| saturation loading |
| saturation transfer |
| saturation vapour pressure |
| sawhorse projection |
| Saytzeff rule |
| scaler |
| scaling circuit |
| scanning electron microscopy (SEM) |
| scanning method in mass spectrometry |
| scanning transmission electron microscopy (STEM) |
| scattering |
scattering angle,
quantity |
scattering cross-section,
|
| scattering error in spectrochemical analysis |
| scattering matrix |
| scattering plane |
| scattering vector |
| scavenger |
| scavenging |
| Schenck sensitization mechanism |
| Schiff bases (Schiff's bases) |
| Schiller layers |
| Schottky-barrier photodiode |
| Schulze–Hardy rule |
| Schulz–Zimm distribution |
| scintillation |
| scintillation counter |
| scintillation detector |
| scintillation spectrometer |
| scintillators |
| s-cis, s-trans |
| scrambling |
| scrubber in atmospheric chemistry |
| scrubbing |
| seco- |
|
second
unit |
| second of arc |
| second messenger |
| secondary crystallization |
| secondary current distribution |
| secondary electron multiplier in mass spectrometry |
| secondary electrons (se)
in in situ microanalysis |
| secondary electron yield
in in situ microanalysis |
| secondary excitation of X-rays |
| secondary fluorescence
in X-ray emission spectroscopy |
| secondary ionization in mass spectrometry |
| secondary isotope effect |
| secondary kinetic electrolyte effect |
| secondary kinetic isotope effect |
| secondary metabolites |
| secondary pollution (emissions) |
| secondary radiation |
| secondary standard |
| secondary structure |
| second-order transition |
| secular equilibrium |
| sediment |
| sedimentation |
sedimentation coefficient,  quantity |
| sedimentation equilibrium |
| sedimentation field strength |
| sedimentation potential difference (sedimentation
potential)
|
sedimentation velocity,
|
| sedimentation velocity method |
| sedimentation volume |
| segment in analytical chemistry |
| segregated star macromolecule |
| segregation |
| segregation in polymers |
| selected area electron diffraction (SAED) |
| selected ion monitoring in mass spectrometry |
| selection in biotechnology |
| selection rule |
| selective in analysis |
| selective corrosion |
| selective detector |
| selective digestion in spectrochemical analysis |
| selective elution in chromatography |
| selective inhibition in catalysis |
| selectively labelled |
| selective micro-sample in spectrochemical analysis |
| selective poisoning in catalysis |
| selective preconcentration in trace analysis |
| selective sample |
| selective solvent in polymer chemistry |
| selective sorption in polymer chemistry |
| selectivity |
| selectivity in analysis |
| selectivity of a reagent |
selectivity coefficient,
in ion exchange chromatography |
selectivity factor,
quantity |
| selectivity factor
in ion exchange chromatography |
| selectivity ratio |
| selenenic acids |
| selenides |
| seleninic acids |
| selenocyanates |
| selenols |
| selenones |
| selenonic acids |
| selenoxides |
| self-absorption |
| self-absorption broadening of a spectral line |
| self-absorption effect
in luminescence spectroscopy |
| self-absorption factor of a radiation source |
| self-diffusion coefficient |
self inductance,  quantity |
| self-poisoning in catalysis |
| self-quenching |
| self-reversal |
| self-shielding |
| selones |
| semicarbazones |
| semicoke |
| semiconductor |
| semiconductor detector |
| semiconductor laser |
| semiconductor-metal transition |
| semi-interpenetrating polymer network (SIPN) |
| semioxamazones |
| semiquinones |
| semi-rigid chain |
| semisystematic name (semitrivial name) |
| seniority (senior) in organic nomenclature |
| sensitive area of a radiation detector |
| sensitive volume of a radiation detector |
| sensitivity in mass spectrometry |
sensitivity,
in metrology and analytical chemistryquantity |
| sensitization |
| sensitization in colloid chemistry |
| sensitized luminescence |
| sensitizer |
| separability assumption |
| separated flame in flame spectroscopy |
| separation coefficient |
separation factor,
in column chromatographyquantity |
separation factor,
in liquid-liquid distributionquantity |
separation number,
in chromatographyquantity |
| separation temperature in chromatography |
| sequence |
| sequence rules |
| sequencing (proteins, nucleic acids) |
| sequential analyser |
| sequential indication of an analyser |
| sequential measuring cell |
| sequential sample |
| sequential spectrometer |
| series of analytical results |
| serum |
| sesquiterpenoids |
| sesterterpenoids |
| settling chamber in atmospheric chemistry |
| settling error in spectrochemical analysis |
| settling velocity |
| shape selectivity in catalysis |
| shear breakdown |
| shear dependent viscosity |
shear modulus,  quantity |
| shear rate |
shear strain,
quantity |
shear stress,
quantity |
| shear thickening |
| shear thinning |
| shear transition |
| shear viscosity |
| shielded flame in flame spectroscopy |
| shielding |
shielding constant,
quantity |
| shish-kebab structure |
| short chain |
| short-chain branch |
| short-range intramolecular interactions
in polymers |
| shut-down state in analysis |
| shut-down time in analysis |
| shuttle vector |
| SI |
| Si |
| sialon |
| side chain |
| side group |
|
siemens
unit |
|
sievert
unit |
| side group or side-chain polymer liquid crystal |
| sigmatropic rearrangement |
| signal in analysis |
| signal sequence |
| silanes |
| silanols |
| silasesquiazanes |
| silasesquioxanes |
| silasesquithianes |
| silathianes |
| silazanes |
| silicones |
| siloxanes |
| silver film |
| silylene |
| silyl groups |
| silyl radicals |
| simple shear |
| simulation technique in analysis |
| simultaneous nucleation |
| simultaneous pair transitions |
| simultaneous reactions |
| simultaneous spectrometer |
| single-beam (luminescence) spectrometer |
| single cell protein (SCP) |
| single channel pulse height analyser |
| single-electron transfer mechanism (SET) |
| single escape peak |
| single-focusing mass spectrometer |
| single photon counting |
| single photon timing |
| single scattering |
| single-step reaction |
| single-strand chain in a polymer |
| single-strand macromolecule |
| single-strand polymer |
| singlet molecular oxygen |
| singlet-singlet absorption |
| singlet-singlet annihilation |
| singlet-singlet energy transfer |
| singlet state |
| singlet-triplet absorption |
| singlet-triplet energy transfer |
| singly labelled |
| sink in atmospheric chemistry |
| sintering |
| size-exclusion chromatography (SEC) |
| skeletal atom |
| skeletal bond |
| skeletal structure |
| skew |
| Slater-type orbital |
| slot burner |
| slow neutrons |
| small particle in radiation scattering |
| smectic state |
| SM-interference |
| SMILES |
| smog in atmospheric chemistry |
| smog chamber in atmospheric chemistry |
| smog index in atmospheric chemistry |
| smoke |
| smooth transition |
| soap |
| soap curd |
| soap film |
| soft acid |
| soft base |
| soiling in atmospheric chemistry |
| sol |
| solar conversion efficiency |
| solar flare |
| solar radiation in atmospheric chemistry |
| sol-gel transition |
solid angle,
 ,
quantity |
| solidification |
| solid phase antibody radioimmunoassay |
| solid solution |
| solid state lasers |
| solid support in column chromatography |
| solidus |
| solid volume in column chromatography |
| solubility |
solubility parameter,
of a polymerquantity |
| solubility product |
| solubilization |
| solute |
| solute-volatilization interference
in flame spectroscopy |
| solution |
| solvation |
| solvatochromic relationship |
| solvatochromism |
| solvent |
| solvent in liquid-liquid distribution |
| solvent extraction |
| solvent front in chromatography |
| solvent ion exchange (SIX) |
| solvent isotope effect |
| solvent migration-distance in chromatography |
| solvent parameter |
| solvent regeneration in extraction processes |
| solvent-separated ion pair |
| solvent-shared ion pair |
| solvent shift |
| solvolysis |
solvophobicity parameter,
quantity |
| solvus |
| SOMO |
| sonication |
| sonoluminescence |
| soot |
| Soret band |
| sorption in colloid chemistry |
| sorption isotherm in ion exchange |
| sorption techniques in trace analysis |
| sorptive insertion in surface catalysis |
| source efficiency of a radiation source |
| sp |
| space charge in a semiconductor |
| space formula |
| space time in catalysis |
| space velocity in catalysis |
| spacer |
| spark (source) ionization in mass spectrometry |
| spatial-distribution interference
in flame spectroscopy |
| spatially resolving detector of radiation |
| special salt effect |
| speciationreplaced |
| speciation analysis in chemistry |
| speciation in chemistry |
| species (taxonomic) |
| specific |
| specific in analysis |
| specific acid–base catalysis |
specific activity,
in radiochemistryquantity |
| specific adsorption |
| specifically absorbing ion |
| specifically labelled |
| specifically labelled tracer |
| specific burn-up |
| specific catalysis |
| specific conductance |
| specific detector in chromatography |
| specific gravity |
specific heat capacity,
 quantity |
| specific ionization in nuclear chemistry |
| specific permeability in chromatography |
| specific photon emission |
| specific pore volume of a catalyst |
| specific retention volume in chromatography |
| specific surface area in surface chemistry |
specific volume,  quantity |
| specific weight |
| specimen in analytical chemistry |
| spectator mechanism |
| spectator-stripping reaction |
| spectral bandwidth error
in spectrochemical analysis |
| spectral distribution |
| spectral (photon) effectiveness |
| spectral intensity |
| spectral interference in flame spectroscopy |
spectral irradiance,
quantity |
| spectral overlap |
spectral photon exitance,
quantity |
spectral photon flow,
quantity |
spectral photon flux (photon irradiance),
quantity |
spectral photon radiance,
quantity |
| spectral quantities |
spectral radiance,
quantity |
spectral radiant exitance,
quantity |
| spectral radiant flux |
spectral radiant intensity,
quantity |
spectral radiant power,
quantity |
| spectral responsivity |
| spectral responsivity function |
| spectral sensitization |
| spectral spheradiance |
| spectrochemical buffer in atomic spectroscopy |
| spectrochemical carrier in atomic spectroscopy |
| spectrogram |
| spectrograph |
| spectrometer |
| spectrometry |
| spectroscope |
| spectroscopy |
| spectrum analysis |
specular reflectance (reflection factor),
in optical spectroscopyquantity |
speed,
 ,
quantity |
speed distribution function,
 |
| speed of light in a vacuumconstant |
| spherical carbonaceous mesophase |
| spherical radiance |
| spherical radiant exposure |
| spherulite |
| spin adduct |
| spin-allowed electronic transition |
| spin conservation rule (Wigner rule) |
| spin counting |
| spin density |
| spin-flip transition |
| spin-flop transition |
| spin-glass transition |
| spin label |
| spinodal decomposition |
| spin-orbit coupling |
spin-orbit coupling constant,  quantity |
| spin-orbit splitting |
| spin-Peierls transition |
| spin probe |
| spin–spin coupling |
spin–spin coupling constant,
|
| spin-state transition |
| spin trapping |
| spiro atom |
| spiro chain in a polymer |
| spiro compounds |
| spiro macromolecule |
| spiro polymer |
| spiro union |
| splicing |
| spontaneous emission |
| spontaneous fission |
| spontaneous resolution |
| spot in chromatography |
| spot sampling |
| sprayer in flame spectroscopy |
| spreading function in chromatography |
| spreading wetting |
| spread monolayer |
| sputtering |
| sputter yield |
| square-wave current |
| SR |
| stability constant |
| stable |
| stable film, metastable film |
| stable ion in mass spectrometry |
| staggered conformation |
| stagnant inversion in atmospheric chemistry |
| standard acceleration of free fall |
| standard atmosphere |
| standard atomic weights |
| standard chemical potential |
| standard concentration |
| standard conditions for gases |
standard deviation,
|
standard electrode potential,
|
| standard electromotive force |
standard entropy of activation,
 ,
|
standard equilibrium constant,
 ,
|
standard Gibbs energy of activation
 ,
|
| standard hydrogen electrode |
standard molality
 ,
|
| standard potential of an electrode reaction |
| standard potential of the reaction in a chemical
cell
|
| standard pressure |
| standard rate constant of an electrode reaction |
| standard reaction quantities |
| standard solution |
| standard state |
| standard subtraction method
in electroanalytical chemistry |
| standard thermodynamic quantities |
| standard uncertainty |
| stand-by state in analysis |
| stannoxanes |
| stannylenes |
| stannylidenes |
| star copolymer |
| Stark effect |
| star macromolecule |
| star polymer |
| starting line in chromatography |
| starting point in chromatography |
| start-up time in analysis |
| state crossing |
| state diagram |
| state function |
| state-to-state kinetics |
| static fields mass spectrometer |
| static pressure |
| static quenching |
| static stability |
| stationary phase (fermentation) |
| stationary phase in chromatography |
| stationary-phase fraction |
stationary phase volume,
in chromatography |
| stationary state |
| statistical coil in polymers |
| statistical copolymer |
| statistical copolymerization |
| statistical factor |
| statistical pseudo-copolymer |
| statistical segment in polymers |
| statistical weight |
| steady state
in liquid-liquid distribution |
| steady state (stationary state) |
| steady state approximation (treatment) |
| Stefan–Boltzmann constantconstant |
| stem cell |
| stem in polymer crystals |
| step in chromatography |
| step height in chromatography |
| stepped surface |
| stepwise elution in chromatography |
| stepwise reaction |
| steradianunit |
| stereoblock macromolecule |
| stereoblock polymer |
| stereochemical formula (stereoformula) |
| stereoconvergence |
| stereodescriptor |
| stereoelectronic |
| stereoelectronic control |
| stereoformula |
| stereogenic unit (stereogen/stereoelement) |
| stereoheterotopic |
| stereohomosequence in a polymer |
| stereoisomerism |
| stereoisomers |
| stereomutation |
| stereoregular macromolecule |
| stereoregular polymer |
| stereorepeating unit in a polymer |
| stereoselective polymerization |
| stereoselective synthesis |
| stereoselectivity |
| stereosequence in a polymer |
| stereospecifically labelled tracer |
| stereospecificity (stereospecific) |
| stereospecific polymerization |
| steric-approach control |
| steric effect |
| steric factor |
| steric factor in polymers |
| steric hindrance |
| steric isotope effect |
| steric strain |
| Stern layer |
| Stern–Volmer kinetic relationships |
| steroids |
| sterols |
| stibanes |
| stibanylidenes |
| stibines |
| stibinidenes |
| stibonium compounds |
| sticking coefficient in surface chemistry |
| sticking probability in surface chemistry |
| sticky ends in biotechnology |
| stimulated emission |
| stirred flow reactor in catalysis |
| stochastic effect |
| stochastic sampling |
| stochastic theories |
| Stockholm convention |
| Stock number |
| stoichiometric |
| stoichiometric capacity |
stoichiometric concentration,
|
| stoichiometric mean molal (practical activity coefficient)
in electrochemistry |
stoichiometric number,  quantity |
| stoichiometry |
| stokesunit |
| Stokes law |
Stokes number,
quantity |
| Stokes parameters |
| Stokes shift |
| Stokes type radiation |
| stopped flow |
| stopped-flow cell in spectrochemical analysis |
| stopping power |
| STP |
| strain |
| strain-induced transition |
| stratified film |
| stratified sample |
| stratocumulus cloud |
| stratopause |
| stratosphere |
| stratus cloud |
| stray radiation error in spectrochemical analysis |
| streak camera |
| streak tube |
| streaming birefringence |
| streaming current |
| streaming potential difference (streaming potential) |
| stress-assisted transition |
| stress graphitization |
| strip dynode photomultiplier tube |
| stripping |
| stripping isotherm |
| stripping ratio in solvent extraction |
| stripping reaction |
| stripping solution
in liquid-liquid distribution |
| strong collision |
| structural disorder |
| structural formula |
| structural transition |
| structure of a catalyst |
| structure–activity relationship (SAR) |
| structure-based design in drug design |
| structure-property correlations (SPC) |
| styphnates |
| subchain of a polymer |
| subgroup-supergroup transition |
| subjacent orbital |
| sublation in solvent extraction |
| sublimation |
| subphase in thin films |
| subsample |
| substance concentration |
substance content,
|
| substance flow rate |
substance fraction,
quantity |
| substituent atom (group) |
| substituent electronegativity |
| substitution reaction |
| substitutive name |
| substoichiometric extraction |
| substoichiometric isotope dilution analysis |
| substrate |
| substrate in biocatalysis |
| substrate in thin films |
| subtractive name |
| successor complex |
| sudden potential-energy surface |
| sugars |
| suicide inhibition |
| suicide metabolism |
| sulfamic acids |
| sulfanes |
| sulfatides |
| sulfenamides |
| sulfenes |
| sulfenic acids |
| sulfenium ions |
| sulfenyl groups |
| sulfenylium ions |
| sulfenyl nitrenes |
| sulfenyl radicals |
| sulfides |
| sulfilimines |
| sulfimides |
| sulfimines |
| sulfinamides |
| sulfinamidines |
| sulfines |
| sulfinic acids |
| sulfinic anhydrides |
| sulfinimines |
| sulfinylamines |
| sulfolipids |
| sulfonamides |
| sulfonamidines |
| sulfonediimines |
| sulfones |
| sulfonic acids |
| sulfonic anhydrides |
| sulfonimides |
| sulfonium compounds |
| sulfonphthaleins |
| sulfonylamines |
| sulfoxides |
| sulfoximides |
| sulfoximines |
| sulfur diimides |
| sultams |
| sultims |
| sultines |
| sultones |
| summit current in polarography |
| summit potential |
sum of states,
|
| superacid |
| superbase |
| superconducting transition |
| supercritical fluid |
| supercritical fluid chromatography (SFC) |
| superequivalent adsorption |
| superexchange interaction |
| superficial work in surface chemistry |
| superlattice |
| superposability |
| superradiance |
| supersaturation |
| support of a catalyst |
| support-coated open-tubular (SCOT) column
in chromatography |
| supporting electrolyte |
| support plate in chromatography |
| suppressor |
| suprafacial |
| supramolecule |
| surface |
| surface active agent |
surface amount,
 ,
quantity |
| surface barrier semiconductor detector |
| surface catalysis |
surface charge density,
quantity |
| surface charge layer |
| surface chemical potential |
surface concentration,
quantity |
| surface (excess) conductivity |
| surface contamination in surface analysis |
surface coverage,
 quantity |
| surface crossing |
surface density,
 ,
quantity |
| surface dilatational viscosity |
| surface dipole layer |
| surface electric potential |
surface excess,
 quantity |
surface excess concentration (at an interface),
 quantity |
| surface excess energy |
| surface excess enthalpy |
| surface excess entropy |
| surface excess Gibbs energy |
| surface excess Helmholtz energy |
| surface excess isotherm |
| surface ionization in mass spectrometry |
| surface ions |
| surface layer (or interfacial layer) |
| surface of a phase (free surface) |
| surface of tension |
| surface potential |
| surface pressure |
| surface reaction in electrochemistry |
| surface region |
| surface rheology |
| surface shear viscosity |
| surface states |
surface stress,
 |
surface tension,
 ,
quantity |
| surface work |
| surfactant (surface active agent) |
surprisal,
|
| surprisal analysis |
| suspended matter in atmospheric chemistry |
| suspension |
| suspension effect in an ion-selective electrode |
| Swain–Lupton equation |
| Swain–Scott equation |
| swelling in colloid and surface chemistry |
| swelling pressure in colloid and surface chemistry |
| switchboard model in polymer crystals |
| switching transition |
| sydnone imines |
| sydnones |
| sym- |
| symbiosis |
| symbol in quantities and units |
| symmetrical films |
| symmetry-breaking transition |
| symmetry-conserving transition |
symmetry number,
quantity |
| symproportionation |
| syn |
| synartetic acceleration |
| synchronization (principle of nonperfect
synchronization)
|
| synchronous |
| synchronously excited (fluorescence, phosphorescence)
spectrum
|
| synchrotron radiation |
| synclinal |
| syndet |
| syndiotactic macromolecule |
| syndiotactic polymer |
| syndiotactic triads in polymers |
| syneresis |
| synergism in solvent extraction |
| synergism in toxicology |
| synoptic scale |
| synperiplanar |
| syntectic reaction |
| synthetic graphite |
| system |
| systematic error |
| systematic name |
| system of units of measurement |
| Système International d'Unités |
| systemic effect |
| Szilard–Chalmers effect |
| θ state in polymers |
| θ temperature in polymers |
| tactic block in a polymer |
| tactic block polymer |
| tacticity |
| tactic macromolecule |
| tactic polymer |
| Taft equation |
| tagged |
| tailing in chromatography |
| tandem mass spectrometer |
| target in biology |
| tautomeric effect |
| tautomerism |
| tautomerization |
| tele in histidine nomenclature |
| telechelic molecule |
| tele-substitution |
| tellurides |
| tellurones |
| telomer |
| telomerization |
| temperature |
| temperature coefficient of responsivity |
| temperature effect in luminescence spectroscopy |
| temperature inversion in atmospheric chemistry |
| temperature jump |
| temperature lapse rate in atmospheric chemistry |
| temperature-programmed chromatography |
| template in biotechnology |
| temporary poisoning in catalysis |
| teraSI unit prefix |
term,
quantity |
| term in X-ray spectroscopy |
| termination |
| terminator in biotechnology |
| termolecular |
| term symbols |
| terpenes |
| terpenoids |
| terpolymer |
| tertiary current distribution |
| tertiary structure |
|
tesla
unit |
| test portion |
| test sample |
| test solution in analysis |
| tetracyclines |
| tetrads in polymers |
| tetrahedral intermediate |
| tetrahedro- |
| tetrapyrroles |
| tetraterpenoids |
| texture of a catalyst |
| theoretical plate number |
| thermal analysis |
| thermal black |
| thermal column in nuclear chemistry |
thermal conductance,  quantity |
thermal conductivity,
quantity |
| thermal conductivity detector
in gas chromatography |
| thermal detector |
| thermal fission |
| thermal ionization in mass spectrometry |
| thermal lensing |
| thermally activated delayed fluorescence |
| thermally-induced transition |
| thermal neutrons |
thermal resistance,  quantity |
| thermoacoustimetry |
| thermochemical analysis |
| thermochemical calorie |
| thermochromism |
| thermocouple |
| thermodilatometry |
| thermodynamically equivalent sphere
in polymer chemistry |
| thermodynamic control of product composition |
| thermodynamic energy |
| thermodynamic equilibrium constant |
| thermodynamic isotope effect |
| thermodynamic quality of solvent
in polymer chemistry |
thermodynamic temperature,
quantity |
| thermoelectrometry |
| thermogram |
| thermogravimetry (TG) |
| thermoluminescence |
| thermolysis |
| thermomagnetometry |
| thermomechanical measurement |
| thermometric |
| thermometric enthalpy titration |
| thermometric titration |
| thermoparticulate analysis |
| thermophile |
| thermophotometry |
| thermopile |
| thermoptometry |
| thermosonimetry |
| thermosphere |
| thermotropic mesophase |
| thiazynes |
| thick film |
| thickness of diffusion layer in electrochemistry |
| thickness of electrical double layer |
| thickness of reaction layer in electrochemistry |
| thin film |
| thin-layer chromatography |
| thio |
| thioacetals |
| thioaldehydes |
| thioaldehyde S-oxides |
| thioanhydrides |
| thiocarboxylic acids |
| thiocyanates |
| thioethers |
| thiohemiacetals |
| thioketones |
| thioketone S-oxides |
| thiolates |
| thiols |
| thionylamines |
| third body |
| thixotropy |
| thiyl radicals |
| threo |
| threo structures in a polymer |
threshold energy,
quantity |
| threshold limit value (TLV) |
| through-bond electron transfer |
| throughput rate |
| through-space electron transfer |
| throwing power |
| TICT emission |
| TICT state |
| tie molecule in polymers |
| tight ion pair |
time,
quantity |
time constant,
of a detectorquantity |
| time-correlated single photon counting |
| time-dependent stoichiometry |
| time-independent stoichiometry |
time, 
of centrifugationquantity |
| time of deactivation in heterogeneous catalysis |
| time-of-flight mass spectrometer |
| time
of solidification of thixotropic recovery |
| time-resolved microwave conductivity (TRMC) |
| time-resolved spectroscopy |
| titrant |
| titration |
| titration curve |
| titration error |
| titre (titer) |
| T-jump |
| tRNA |
|
tonne
unit |
| topical effect |
| topochemical reaction |
| topomerization |
| topomers |
| topotactic reaction |
| topotactic transition |
torque,  quantity |
| torquoselectivity |
|
torr
unit |
| torsional braid analysis |
| torsional stereoisomers |
| torsional strain |
| torsion angle |
| total absorption peak |
| total chemiflux |
total consumption time
,
in flame emission and absorption spectrometryquantity |
| total ion current in mass spectrometry |
total velocity of the analyte,  in capillary electrophoresisquantity |
| totally porous packing in chromatography |
| total radiant power |
total retention volume (time),
 ,
in column chromatography |
| toxicity |
| toxicodynamics |
| toxicokinetics |
| toxicology |
| toxin |
| toxinology |
| traceability |
| trace element |
| tracer |
| track (nuclear) |
| track detector (nuclear) |
| trajectory in reaction dynamics |
| trans |
| trans- in inorganic nomenclature |
| transannular strain |
| trans conformation in polymers |
| transcription in biotechnology |
| transducer |
| transduction in biotechnology |
| transfer |
| transfer in analysis |
| transferability |
transfer activity coefficient,
|
| transferases |
| transfer line |
| transfer RNA (tRNA) |
| transformation |
| transformation in gene technology |
| trans-fused |
| transient phase (induction period) |
| transient (chemical) species |
| transient spectroscopy |
| transition |
| transition coordinate |
| transition element |
| transition interval in titrimetric analysis |
| transition layer |
transition (dipole) moment
|
| transition polarization |
| transition probability for absorption
in spectrochemistry |
| transition probability for spontaneous emission
in spectrochemistry |
| transition probability for stimulated emission
in spectrochemistry |
| transition species |
| transition state |
| transition state analogue |
| transition state theory |
| transition structure |
| transition temperature (for liquid crystals) |
| transition time in electroanalytical chemistry |
transition wavenumber,
quantity |
transit time,
in flame emission and absorption spectrometryquantity |
| translation in biotechnology |
| translational spectroscopy |
| transmission |
| transmission in mass spectrometry |
| transmission coefficient |
| transmission electron energy loss spectroscopy
(TEELS)
|
| transmission electron microscopy (TEM) |
| transmission factor |
| transmission high energy electron diffraction
(THEED)
|
transmittance,
 ,
 quantity |
| transoid conformation |
| transport in analysis |
| transport control |
| transport interference in flame spectroscopy |
transport number,
quantity |
| transposon |
| transtactic polymer |
| trapping |
travel time,
in flame emission and absorption spectrometryquantity |
| treated solution in analytical chemistry |
| triads |
| triangulo- |
| triazanes |
| triazenes |
| triboluminescence |
| trimethylenemethanes |
| trioxides |
| triple point |
| triplet state |
| triplet-triplet absorption |
| triplet-triplet annihilation |
| triplet-triplet energy transfer |
| triplet-triplet transitions |
| triprismo- |
| tritactic polymer |
| triterpenoids |
| tritide |
| tritio |
| tritium |
| triton |
| trivial energy transfer |
| trivial name |
| Troe expression |
| tropilidenes |
| tropolones |
| tropones |
| tropopause |
| troposphere |
| tropylium ions |
| tropyl radicals |
| true coincidence in radiochemistry |
| 'true' rate constant |
true value,
in analysis |
| tub conformation |
| tunable laser in spectrochemical analysis |
| Tung distribution
of a macromolecular assembly |
| tunnelling |
| turbidimetric titration |
turbidity,
in light scatteringquantity |
| turnover frequency in catalysis |
| turnstile rotation |
| turntable reactor |
| twisted internal charge transfer (TICT) |
| twist form |
| two-colour indicator |
| two-dimensional chromatography |
| two-photon excitation |
| two-photon process |
| two-site immunoradiometric assay |
| u |
| ulosonic acids |
| ultimate capacity in solvent extraction |
| ultrafiltrate |
| ultrafiltration |
| ultrasonic detector in gas chromatography |
| umpire sample |
| umpolung |
| unactivated adsorption process |
| uncertainty of measurement |
| unified atomic mass unitunit |
| uniform corrosion |
| uniformly labelled |
| uniformly labelled tracer |
| uniform polymer |
| unimolecular |
| unit (item/portion/individual)
in analytical chemistry |
| unit of measurement |
| unit cell |
| unit system |
| universal calibration in chromatography |
| universal detector in chromatography |
| unperturbed dimensions in polymers |
| unreactive |
| unresolved peak in chromatography |
| unstable |
| unstable film |
| unstable ion in mass spectrometry |
| unsymmetrical films |
| unzipping |
| upconversion |
| upfield |
| uphill transport in membrane processes |
| upper limit of measurement
in atmospheric trace component analysis |
| upstream in membrane processes |
| uptake |
| ureides |
| urethanes (urethans) |
| uronic acids |
| uronium salts |
| useful spectral range |
| UV dose |
| UV photoelectron spectroscopy (UPS) |
| UV stabilizer |
| vaccine |
| vacuum phototube |
| vacuum system in mass spectrometry |
| valence |
| valence band |
| valence isomer |
| valence tautomerization |
| valence transition |
| value of a quantity |
| value of a division
of a precision balance scale |
| van der Waals adsorption |
| van der Waals broadening
of a spectral line |
| van der Waals forces |
vaporization temperature,
in electrothermal atomization |
| vapour phase interference in analysis |
variable,
|
| variable pathlength cell
in spectrochemical analysis |
variance
 ,
|
| variational transition state theory |
| variegated star macromolecule |
| Vavilov rule |
| vector in biotechnology |
velocity,  ,  quantity |
| velocity in mass transport |
| verdazyl radicals |
| vertical ionization |
| vertical transition |
| Verwey transition |
| vibrationally adiabatic transition-state theory |
| vibrational redistribution |
| vibrational relaxation |
vibrational term,  quantity |
| vibronic coupling |
| vibronic transition |
| vidicon |
| vinyl carbenes |
| vinylic cations |
| vinylic groups |
| vinylidenes |
| viologens |
| virial coefficients |
| virtual transition |
| viscosity |
viscosity function,
quantity |
| viscosity number of a polymer |
| viscosity ratio |
| visibility in atmospheric chemistry |
| volatilization |
| volatilizer |
|
volt
unit |
| voltage in electroanalysis |
| voltammetric constant |
| Volta potential difference |
volume content,
 |
volume flow rate,
 quantity |
volume fraction,
quantity |
volume of activation,
quantity |
| volume of the stationary phase in chromatography |
| volume rate |
| volume reaction in electrochemistry |
volume strain (bulk strain),
quantity |
| volumetric flowrate in gas chromatography |
| volume viscosity (or dilatational viscosity) |
| volumic |
| Wagner number |
| Walden inversion |
| wall-coated open-tubular (WCOT) column
in chromatography |
| wash out in atmospheric chemistry |
|
watt
unit |
wavefunction (state function),
 ,
 ,
|
| wave height (electrochemical) |
wavelength,
quantity |
| wavelength converter |
| wavelength dispersion
in X-ray emission spectroscopy |
| wavelength-dispersive X-ray fluorescence analysis |
| wavelength error in spectrochemical analysis |
wavenumber,
 ,
quantity |
| weak collision |
|
weber
unit |
| weathering |
| wedge projection |
weight,
 quantity |
| weight-distribution function |
| weighted mean |
| Weller correlation |
| Westcott cross-section |
| wet bulb temperature |
| wetting tension (or work of immersional wetting per unit
area)
|
| Wheland intermediate |
| Wiegner effect |
| Wigner rule |
| Wilzbach labelling |
| wind rose |
| Wittig reagents |
| Wood horn |
| Wood lamp |
| Woodward–Hoffmann rules |
work,  ,  quantity |
| work hardening |
| working electrode |
| work of adhesion |
| work of cohesion per unit area |
| work of immersional wetting per unit area |
| work of separation |
| work softening |
| worm-like chain in polymers |
| ξ- (xi-) |
| xanthates |
| xanthene dyes |
| xanthic acids |
| xanthophylls |
| xenobiotic |
| xenobioticssuperseded |
| xenon lamp |
| xerogel |
| XPS |
| X-radiation |
| X-ray escape peak |
| X-ray fluorescence |
| X-ray fluorescence analysis |
| X-ray intensity |
| X-ray level |
| X-ray photoelectron spectroscopy (XPS) |
| X-ray satellite |
| X-ray spectroscopy |
| x unitunit |
| xylylenes |
| YAG |
|
yard
unit |
|
year
unit |
yield,
in biotechnologyquantity |
| yield stress |
| ylides |
| ynamines |
| ynols |
| yoctoSI unit prefix |
| yottaSI unit prefix |
| Young's modulus |
| Yukawa–Tsuno equation |
| ζ-potential |
| Z |
| Z-value |
| Zaitsev rule |
| Zeeman effect |
| zeptoSI unit prefix |
| zero field splitting |
| zero point of a glass electrode |
| zero point of scale of a balance |
| zero–zero (0–0) absorption or emission |
| zeta |
| zettaSI unit prefix |
| zig-zag projection |
| Zimm plot |
| zone in chromatography |
| zone melting method of preconcentration |
| Zucker–Hammett hypothesis |
| zwitterionic compounds/zwitterions |
| zygote |
| sc |
