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研究了在稀释酸介质中 ,痕量金 催化溴酸钾氧化偶氮胂Ⅲ褪色的指示反应及其动力学条件 ,据此建立测定痕量金 的新方法。方法的检出限为 7 96× 10 -11g mL ;测定范围为0～ 1.2× 10 -6g 2 5mL。采用聚氯乙烯 尼龙 6树脂分离富集样品中的金 ,用于样品的测定获得满意结果。
In dilute acid medium, the trace reaction of arsenazo Ⅲ with potassium bromate catalyzed by trace gold and its kinetic conditions were studied. A new method for the determination of trace gold was established. The detection limit of the method was 7 96 × 10 -11g mL; the determination range was 0 ~ 1.2 × 10 -6g 2 5mL. Polyvinyl chloride nylon 6 resin was used to separate and enrich the gold in the sample for the determination of the sample to obtain satisfactory results.