ISO 16664:2017描述了可能影响校准用纯气体和均匀气体混合物成分的因素。本文件仅适用于“使用期”内的气体或气体混合物。它为校准气体混合物的处理和使用提供了以下指南: -储存校准气瓶； -从气瓶中取出校准气体； -将校准气体从气瓶转移到校准点。 它还概述了评估气体混合物稳定性的方法，考虑到证书上给出的气体成分不确定性和用户的测量不确定性。

ISO 16664:2017 describes factors that may influence the composition of pure gases and homogeneous gas mixtures used for calibration purposes. This document only applies to gases or gas mixtures that are within the "utilization period". It provides the following guidelines for the handling and use of calibration gas mixtures: - storage of calibration gas cylinders; - calibration gas withdrawal from cylinders; - transfer of calibration gas from cylinders to the point of calibration. It also outlines a method of assessing the stability of a gas mixture, taking into account the gas composition uncertainty given on the certificate and the user's measurement uncertainty.