zero air
English
[edit]
Pronunciation
[edit]- Rhymes: -ɛə(ɹ)
Noun
[edit]- (analytical chemistry, chromatography) Atmospheric air specially cleaned so that it contains less than 0.1 ppm of hydrocarbon impurities.
- For calibration, first pass a known range of concentrations of the gas through the gas chromatograph, for comparison with zero air that contains effectively none of the gas to be measured.