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IUPAC Compendium of Chemical Terminology
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u
ulosonic acids
ultimate capacity (in solvent
extraction)
ultrafiltrate
ultrafiltration
ultrasonic detector (in gas chromatography)
umpire sample
umpolung
unactivated adsorption process
uncertainty of measurement
uncertainty (Heisenberg) principle
unified atomic mass unit
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 critical solution temperature
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
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