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Words, grammatical forms and meanings linked to the ontology.

zero air en · NOUN

Meanings

  1. (qualifier:analytical chemistry) 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.