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zero air

noun

zero air

noun
1

Chemistry, Chromatography, Natural sciences, Physical sciences Atmospheric air specially cleaned so that it contains less than 0.1 ppm of hydrocarbon impurities.

Analytical chemistry

  • 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.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.