三氧化钨及矿样中微量锑的催化极谱测定

来源期刊：中南大学学报(自然科学版)1985年第1期

论文作者：吴家泉 唐宁 常晓明

文章页码：65 - 70

关键词：三氧化钨； 催化极谱测定； 氢化物产生； 抗坏血酸； 微量锑； 峰电流； 络合物； 氯化钠； 矿样； 导数波

摘    要：本文提出三氧化钨及矿样中微量锑的催化极谱测定方法。锑-氟隆络合物在0.04M硫酸-0.4%抗坏血酸-0.65M氯化钠底液中有波形好,灵敏度高且稳定的络合物吸附波,导数波峰电位在-0.3V(vs.S.C.E.),锑在0.004—0.5μg/ml范围峰电流与浓度呈线性关系。锑与干扰元素的分离采用锑氢化物气化法。用拟定的方法测定三氧化钨及矿样中微量锑,结果对照满意。

Abstract: In this paper a method is provided for the quantitative determination of the trace amounts of the antimony in tungstic oxide and ores by means of polarographic catalytic wave of antimony. The complex of antimony with ferrone produces a good and sensitive catalytic wave in 0.04M sulfuric acid-0.40% ascorbic acid-0.65M sodium chloride solution. The peak potential of derivative wave appears at -0.3V (vs S. C. E). The peak height is directly proportional to the concentration of antimony in the range of 0.004—05μg/ml. The antimony in the gaseous form of antimony hydride is separated from interfering ions. This method can be applied to determining the trace amounts of antimany in tungstic oxide and ores with satisfactory experimental results.