ISO 6142-1:2015规定了一种用于制备气瓶中的校准气体混合物的重量法，其具有一个或多个组分的物质分数（量分数）的可追溯值。 ISO 6142的这一部分描述了一种用于计算与每个组件的数量分数相关联的不确定性的方法。这种不确定性计算需要评估由于包括称重过程，组分的纯度，混合物的稳定性和最终混合物的验证等因素对不确定性的贡献。 ISO 6142-1:2015仅适用于气态或完全蒸发的组分的混合物，其可以以气态或液态引入气缸。 ISO 6142的这一部分涵盖了二元和多组分气体混合物（包括天然气类型的混合物）。在单一过程中批量生产多种混合物的方法不包括在ISO 6142的这一部分中。 ISO 6142-1:2015要求对其预期使用寿命（最长使用寿命）的混合物的稳定性进行估计，但不适用于无意中相互作用的部件。 ISO 6142的这一部分还要求在制备中使用的每种母体气体或液体中的杂质

ISO 6142-1:2015 specifies a gravimetric method for the preparation of calibration gas mixtures in cylinders with traceable values for the amount-of-substance fraction (amount fraction) of one or more components. This part of ISO 6142 describes a method for calculating the uncertainty associated with the amount fraction of each component. This uncertainty calculation requires the evaluation of the contributions to the uncertainty due to factors including the weighing process, the purity of the components, the stability of the mixture, and the verification of the final mixture. ISO 6142-1:2015 is only applicable to mixtures of gaseous or totally vaporized components, which may be introduced into the cylinder in the gaseous or liquid state. Both binary and multi-component gas mixtures (including natural-gas type mixtures) are covered by this part of ISO 6142. Methods for the batch production of more than one mixture in a single process are not included in this part of ISO 6142. ISO 6142-1:2015 requires estimation of the stability of the mixture for its intended life time (maximum storage life), but it is not for use with components that react with each other unintentionally. This part of ISO 6142 also requires the impurities in each parent gas or liquid used in the preparation of the mixture to be assessed and quantified.