【摘要】 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．更多还原

【Abstract】 In this paper, a method is proposed to Concentrate Cr (Ⅵ) in the form of undissolved mercury salt, followed by the cathodic-stripping voltammetry for determining C, (Ⅵ) and Cr (Ⅲ) in environmental water. The character of eletrodeposit for concentrating Cr (Ⅵ) in the form of undissolved mercury salt and it’s cathodic-stripping are studied. At the same time, the precision and recovery of this method, the interference of the coexistent elements and thei elimination are also studied. In 0.2N KNO3 solution (PH 2-3), using mercury membrane electrode as work electrode, Cr(Ⅵ)and Cr (Ⅲ) in nine types of environmental water are successfully determined. All of the errors of recovery are less than 10%, and the results of determination of some wa- ter samples are quite well agreed with those of spectrophotometry.更多还原