ISO 6143:2025 pdf download,Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures.

ISO 6143:2025 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.