English Dictionary

zero air

名詞

atmospheric air specially cleaned so that it contains less than 0.1 ppm of hydrocarbon impurities; it then is usable in laboratory procedures such as versions of gas chromatography in which sufficiently pure air may serve as a carrier gas.

日本語の意味

大気中の炭化水素不純物が0.1 ppm以下にまで除去された、実験室でのガスクロマトグラフィーなどにおいてキャリアガスとして使用される非常に純度の高い空気。

The laboratory used zero air to calibrate the gas analyzers before starting the measurements.

研究室では測定を開始する前に、炭化水素不純物が0.1 ppm未満になるように精製した大気を用いてガス分析計の較正を行った。

意味（1）

atmospheric air specially cleaned so that it contains less than 0.1 ppm of hydrocarbon impurities; it then is usable in laboratory procedures such as versions of gas chromatography in which sufficiently pure air may serve as a carrier gas.

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.