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阳极溶出伏安法测定高纯金属及高纯试剂中的痕量杂质,正日益得到广泛的应用。我们研究了以酸溶试样后,不用分离主体锌,即可在普通笔录式极谱仪上,用玻碳汞膜电极同时测定其中四种痕量杂质元素Cd、Pb、Cu、Bi的极谱行为和测定条件。实验结果表明:在大量基体Zn存在下,最佳支持电解质体系为:1MHCl～0.2 MNH_4Ac～5×10~(-4)MHgCl_2,只预电解5分钟,Bi、Pb及Cd、Cu的灵敏度分别为4×10~(-10)g/ml、6×10~(-10)g/ml及
Anodic stripping voltammetric determination of trace impurities in high purity metals and high purity reagents, is increasingly widely used. We studied the acid-soluble sample, without the separation of the main body of zinc, you can use a common glass-mercury film electrode simultaneous determination of four trace impurities of Cd, Pb, Cu, Bi pole Spectral behavior and measurement conditions. The experimental results show that the best supported electrolyte system is 1MHCl ~ 0.2 MNH_4Ac ~ 5 × 10 ~ (-4) MHgCl2 in the presence of a large amount of Zn, the pre-electrolysis only for 5 minutes, the sensitivity of Bi, Pb and Cd, Cu are 4 × 10 ~ (-10) g / ml, 6 × 10 ~ (-10) g / ml and