The direct and simultaneous determination of copper, cadmium and cobalt in zinc electrolyte by inductively coupled plasma atomic emission spectrometry (ICP-AES) was studied. Sample did not need pretreatment. The spectral lines with wavelengths of 327. 393 nm, 226. 502 nm and 228. 616nm were selected as the analytical lines of copper, cadmium and cobalt respectively. The background interference and overlap interference were eliminated or reduced by selecting analysis line and adjusting background points. The effect of the matrix was overcome by matrix matching method. The contents of copper, cadmium and cobalt in smelter zinc electrolyte were determined by ICP-AES in 3% (V/V) HNO3 medium. The method was simple, rapid and reliable. The measured value of sample was consistent with the results of polarography, with the relative standard deviation of 0. 7% - 1. 3%. The method can be used for the control analysis of the contents of impurity elements in zinc electrolyte.%研究了用电感耦合等离子体原子发射光谱法(ICP-AES)直接同时测定锌电解液中的铜、镉、钴含量的方法.试样不经预处理,在3％ (V/V)的HNO3介质中,以327.393 nm、226.502nm、228.616 nm波长的谱线分别作为铜、镉、钴的分析线,通过选择分析线和调扣背景点来消除或减少背景干扰和重叠干扰,采用基体匹配方法克服基体效应,用ICP-AES测定了冶炼厂锌电解液中的铜、镉、钴含量.该法操作简单,分析快速、可靠,样品的测定值与极谱法的测定值相符,相对标准偏差在0.7％～1.3％之间,可用于锌电解液中杂质元素含量的控制分析.
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