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系统分析了便携式气相色谱检测环境空气中H2S浓度的不确定度来源,对各不确定度分量进行了计算,提出了该方法的合成不确定度和扩展不确定度。通过对各不确定度分量的分析,表明不确定度主要来源于气袋体积及进样重复性引入的不确定度。
The source of uncertainty for the detection of H2S concentration in ambient air by portable gas chromatography was systematically analyzed, and the components of each uncertainty were calculated. The synthetic uncertainty and the extended uncertainty of the method were proposed. The analysis of each component of uncertainty shows that the uncertainty comes mainly from the volume of the airbag and the uncertainty introduced by injection repetition.