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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
'Math - quot' value
ab initio calculationssuperseded
abatement in atmospheric chemistry
abeo-
abiological
abiotic
abiotic transformation
absolute activation analysis
absolute activity, Math - titlequantity
absolute configuration
absolute counting in radioanalytical chemistry
absolute electrode potential
absolute full energy peak efficiency
absolute lethal concentration (Math - title)quantity
absolute lethal dose (Math - title)quantity
absolute photopeak efficiency
absolute preconcentration in trace analysis
absorbance, Math - titlequantity
absorbance matching in spectrochemical analysis
absorbed dose of a substance
absorbed dose, Math - title of radiation
absorbed electron coefficient in in situ microanalysis
absorbed electrons in in situ microanalysis
absorber
absorptance, Math - titlequantity
absorption
absorption coefficient
absorption coefficient in biology
absorption cross-section, Math - titlequantity
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, Math - title) scan in mass spectrometry
acceleration, Math - titlequantity
acceleration energy in in situ microanalysis
acceleration of free fall, Math - titlequantity
accelerator in solvent extraction
acceptable daily intake (Math - title) (1993, 65, 2008)quantityreplaced
acceptable daily intake (Math - title) (2004, 76, 1036)quantity
acceptor number (Math - title)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 Math - titlequantity
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, Math - title of a radioactive materialquantity
activity (relative activity), Math - titlequantity
activity coefficient, Math - title, Math - titlequantity
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, Math - titlequantity
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, Math - titlequantity
amount fraction, Math - title (Math - title for gaseous mixtures)quantity
amount of substance, Math - titlequantity
amount-of-substance concentration
amount-of-substance fraction, Math - title
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, Math - titlequantity
angle strain
ångström unit
angular distribution
angular frequency, Math - titlequantity
angular momentum, Math - titlequantity
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, Math - title 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 Math - title 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 Math - titlequantity
atomic mass constantconstant
atomic mass unit
atomic number (proton number), Math - titlequantity
atomic orbital, Math - title, Math - title, Math - title
atomic ring-sector
atomic spectral lines
atomic symbol
atomic units
atomic weight
atomization in analytical flame spectroscopy
atomization surface temperature, Math - title in electrothermal atomization
atomize
atomizer in analytical flame spectroscopy
atom–molecule complex mechanism
atropisomers
attachment
attenuance, Math - titlequantity
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