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本文作者以放射性Ag~(110)作示踪剂,应用放射性滴定法对卤素离子混合物提出了一种容量分析方法。该法是用NH_3-H_2O-NH_4NO_3缓冲溶液控制被分析溶液的PH以使AgX(X=Cl′、Br′、I~-)分级沉淀作为基础:PH9.8—10.2之间进入沉淀相的只是AgI;PH8.6—8.7时进入沉淀相的是AgBr和AeI;在不使用缓冲溶液时全部AgX进入沉淀相。由所得各等当点计算混合物中各卤素离子的含量。作者们还从实验上研究了各卤素离子含量的改变对测定的影响以及某些杂质离子(CrO_4″、PO_4″′、SO_4″和CNS′)的影响。
The authors used radioactive Ag ~ (110) as a tracer, the use of radioactive titration of halogen mixtures proposed a capacity analysis. The method is to control the pH of the solution to be analyzed by using NH3-H20-NH4NO3 buffer solution to make the precipitation of AgX (X = Cl ’, Br’, I ~) as the base: AgI; AgBr and AeI entering the precipitate phase at pH 8.6-8.7; all AgX entering the precipitate phase without the buffer solution. From each equivalence point obtained, the content of each halogen ion in the mixture was calculated. The authors also experimentally investigated the effect of varying halide ion content on the assay and the effects of certain impurity ions (CrO 4 “, PO 4”, SO 4 "and CNS ’).