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  • ISO
    ISO 6143:2025 Gas analysis - Comparison methods for determining and checking the composition of calibration gas mixtures
    Edition: 2025
    $517.03
    / user per year

Content Description

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.



About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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