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本文应用以难溶汞盐形式富集铬（Ⅵ）、阴极溶出伏安法测定环境水中的铬（Ⅵ）和铬（Ⅲ） 并研究了以难溶汞盐形式富集铬（Ⅵ）的电积和阴极溶出的特性．方法的精密度和回收率，共存 元素的干扰及其消除方法。在０．２０Ｎ的硝酸钾（ｐＨ：２～３）的溶液中，以汞膜电极为工作电极， 测定了九种环境水样中铬（Ⅵ）和铬（Ⅲ）的含量，回收误差均在１０％以下。部分水样与用分光 光度法进行水质普查测定总铬的结果相比较基本一致．
In this paper, chromium (Ⅵ) and chromium (Ⅲ) in environmental water were determined by chromium (Ⅵ) enrichment with mercury in insoluble form and cathodic stripping voltammetry. Product and cathodic dissolution characteristics. Methods of precision and recovery, coexistence of elements of interference and its elimination method. The contents of Cr (Ⅵ) and Chromium (Ⅲ) in nine environmental water samples were determined by using mercury film electrode as working electrode in 0.20N potassium nitrate solution (pH: 2-3) Below 10%. Part of the water samples and spectrophotometry for the determination of total chromium water quality results are basically the same.