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:探讨了以预镀汞膜玻碳电极为工作电极 ,同时测定锑类金属及其氧化物和硫化物中铜、铋的计时电位溶出法的适宜条件 ;试验了酸介质和常见元素对测定的影响 ;选择了仪器的最佳工作条件。结果表明 ,在 0 1mol/LHCl- 0 0 1mol/L抗坏血酸底液中 ,相对饱和氯化钾甘汞电极 ,铜与铋的溶出峰电位分别为 - 0 2 0V和 - 0 1 0V ,分辨效果较好。在测定条件下 ,铜和铋的线性范围分别为 0～ 30 0μg/L和 0～ 80 μg/L ,检出限分别为 7μg/L和 2 μg/L。用该法测定出口锑中铜和铋 ,结果与AAS及ICP -AES法测定值吻合 ,三次重复测定的RSD在 1 2 %～ 4 1 %。
The suitable conditions for the chronopotentiometric dissolution of copper and bismuth in antimony metal and its oxides and sulfides were discussed. The effects of acid medium and common elements on the determination of Influence; choose the best working condition of instrument. The results showed that the elution peak potentials of copper and bismuth at 0 1 mol / LHCl-0 0 1 mol / L ascorbic acid were -0.02 V and -1.0 V respectively, it is good. The linear range of copper and bismuth was 0 ~ 30 0μg / L and 0 ~ 80μg / L, respectively. The detection limits were 7μg / L and 2μg / L respectively. The method was used to determine copper and bismuth in the exported antimony. The results were in agreement with those of AAS and ICP-AES. The RSD of three repeated determinations was between 12% and 41%.