标准摘要
[中文适用范围]： 该方法适用于含量大于0.001%（m/m）的水溶性盐。 在特殊情况下，无法测定在酸性介质中制备的主溶液中的离子。 其原理在于测试部分的溶解和不溶物的分离。 在乙二醛-双-(2-羟基苯胺) (GBHA) 和媒染黑 11 (Cl 14645) 分别作为指示剂存在下，使用乙二胺四乙酸二钠 (EDTA) 滴定根据 ISO 2479 获得的滤液。 [外文原描述]： The method is applicable to water-soluble salts for contents greater than 0,001 % (m/m). In a special case, the determination of ions in a principal solution prepared in an acid medium is pooible. The principle consists in dissolution of a test portion and separation of insoluble matter. Titration of the filtrate obtained according to ISO 2479 using disodium ethylendiamintetraacetate (EDTA) in the presence of glyoxal-bis-(2-hydroxyanil) (GBHA) and mordant black 11 (Cl 14645) respectively as indicators.
英文名称Sodium chloride for industrial use — Determination of calcium and magnesium contents — EDTA complexometric methods