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铜(Ⅰ)离子作库仑滴定剂广泛地应用在间接库仑分析法中。在盐酸溶液中,它是一个中等强度的还原剂(E°Cu~(2+)/Cu~+=0.153伏),除能够在惰性电极上电还原铜化物产生之外,还能用铜电极极化产生,借以滴定某些氧化剂或其混合物。用铜(Ⅰ)库仑滴定金已有文献报导过,本文在前人工作基础上,详细考查了在盐酸介质中电生铜(Ⅰ)的电流效率,研究了提高滴定金准确度和精密度的方法以及铂族金属离子等对滴定的影响。直接称取金标准试样的分析结果同试样本身纯度进行比较,证明平均误差可达0.04％。
Copper (I) ions as Coulometric titrants are widely used in indirect coulometric analysis. It is a moderate strength reductant (E ° Cu 2 + / Cu ~ + = 0.153 V) in hydrochloric acid solution. In addition to being able to electrically reduce the copper compound on the inert electrode, the copper electrode Polarization is produced by titration of certain oxidants or mixtures thereof. The use of copper (Ⅰ) coulomb titration gold has been reported in the literature, based on previous work on the basis of a detailed examination of the current efficiency of copper (Ⅰ) in hydrochloric acid medium, the study to improve the accuracy and precision of titration gold Methods and platinum group metal ions on the titration. The result of the direct comparison of the gold standard sample with that of the sample itself shows that the average error can reach 0.04%.