气体分析 校准气体混合物组成确定和验证的比较方法

[中文适用范围]： 1 适用范围 本文件规定了以下方法： — 通过与适当的参考气体混合物进行比较，确定校准气体混合物的组成； — 根据与之比较的参考气体混合物组成的已知不确定度，计算校准气体混合物组成的不确定度； — 通过与适当的参考气体混合物进行比较，验证赋予校准气体混合物的组成； — 在组成密切相关的一组校准气体混合物中进行一致性检验和异常值查找。 注1：原则上，本文件中描述的方法也可用于分析（基本上）未知的样品，而非预期作为校准气体混合物使用的气体混合物。然而，此类应用需要适当的注意，并考虑额外的不确定度因素，例如校准所用参考气体与分析样品之间基质差异的影响。 [外文原描述]： This document specifies methods for: — determining the composition of a calibration gas mixture by comparison with appropriate reference gas mixtures; — calculating the uncertainty of the composition of a calibration gas mixture in relation to the known uncertainty of the composition of the reference gas mixtures with which it was compared; — checking the composition attributed to a calibration gas mixture by comparison with appropriate reference gas mixtures; — consistency testing and outlier search in suites of calibration gas mixtures of closely related composition. NOTE 1 In principle, the method described in this document is also applicable to the analysis of (largely) unknown samples instead of prospective calibration gas mixtures (i.e. gas mixtures which are intended for use as calibration gas mixtures). Such applications, however, need appropriate care and consideration of additional uncertainty components, for example, concerning the effect of matrix differences between the reference gases used for calibration and the analysed sample. NOTE 2 Comparison methods based on one- and two-point calibration are described in ISO 12963 .