标准摘要
[中文适用范围]： GB/T 20432的本部分规定了照相级化学品重金属和铁含量测定的通用试验方法。 注：如果单独分析重金属或者足铁，只需准备一个稀释的标准溶液。 [外文原描述]： The method is based on preparation of test samples and heavy metals standard solutions, preconditioning them, addition of sodium sulfide solution (for determination of heavy metals) or 1,10-phenanthroline reagent (for determination of iron), dilution with water, mixing well, transfer to two Nessler colour-comparison cylinders, and comparing the colour of both solutions.
英文名称Photography — Photographic-grade chemicals — Test methods — Part 5: Determination of heavy metals and iron content