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本文提出了利用阳极溶出催化波测定微量碲的方法。 在氯化钠或溴化钠底液中,把碲电解富集在玻璃碳电极上,然后在含有氯化亚锡、盐酸、硫酸和高氯酸的催化体系中进行溶出催化,获得溶出催化波。文中考察并确定了最佳测定条件。溶出催化电流与碲的浓度在1×10~(-7)—4×10~(-9)M范围内有线性关系。最低浓度测定到8×10~(-10)M。用本方法对天然水和固体样品中的微量碲进行了测定,均得满意结果。
This paper presents a method for the determination of trace tellurium by anodic stripping catalytic wave. In sodium chloride or sodium bromide, the tellurium is enriched in the glassy carbon electrode by electrolysis and then eluted and catalyzed in a catalytic system containing stannous chloride, hydrochloric acid, sulfuric acid and perchloric acid to obtain a leaching catalytic wave . The paper investigated and determined the best determination conditions. The results show that there is a linear relationship between the concentration of tellurium and the concentration of tellurium in the range of 1 × 10 -7 -7 -4 × 10 -9 M. The lowest concentration was determined to 8 × 10 ~ (-10) M. The method has been applied to the determination of trace tellurium in natural water and solid samples with satisfactory results.