本文件规定了实验室物理化学水分析用定量方法初始评估期间，适用于测定性能特征（包括不确定度）的代表性材料。 本文件重点介绍五种主要类型的水: -饮用水（5.2）； -天然水域（5.3）； -废水（5.4）； -海洋水域（5.5）； -休闲水域（5.6）。 注:如果有适当的理由，可以将其他更具体或不太常见的水类型纳入上述任何类型。标准基质的特性与所处理样品的特性一致。

This document specifies representative materials suitable for the determination of the performance characteristics, including uncertainty, during the initial assessment of a quantitative method, used in a laboratory, for physico-chemical water analysis. This document focuses on five main types of water: — waters intended for consumption (5.2); — natural waters (5.3); — waste waters (5.4); — marine waters (5.5); — recreational waters (5.6). NOTE Other more specific or less common types of water can be incorporated in any of the above types provided appropriate justifications. The characteristics of the standard matrix are compatible with the characteristics of the samples handled.