本文介绍一种锌和镉共存时的同时测定方法。由于锌和镉的化学性质相似,在分析中除了两者含量少时可用极谱分析外,通常需要经过有机试剂或离子交换等分离手续,费时而不易测准。我们以亚铁氰化钾为试剂,用双铂极电流法(即死停终点滴定法)在一个试样中同时测定锌和镉,不必事先分离,从而解决了海绵镉试样中锌镉的快速分析问题。 This article describes a simultaneous determination of zinc and cadmium simultaneously. Due to the similar chemical nature of zinc and cadmium, in addition to the polarographic analysis of the two can be used in the analysis, often need to go through an organic reagent or ion exchange separation procedures, time-consuming and difficult to measure. We use potassium ferrocyanide as a reagent to determine zinc and cadmium simultaneously in one sample by the double platinum current method (ie, dead-end titration) without prior separation, thus resolving the rapidity of zinc-cadmium in the sponge cadmium sample analyse problem.