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测定硫代硫酸盐的方法不少,以碘量法用得最广。但是,研究新的方法仍然是很有意义的,特别是采用原子吸收法间接进行测定。笔者的研究表明,通过AgCl_((固))+S_2O_3~(2-)(?)AgS_2O_3~-+Cl~-多相反应,用原子吸收法测定滤液中的银可间接测定硫代硫酸盐。试验部分一试剂与仪器 6201红色担体:20～40目 AgNO_3、NaCl溶液:0.5M Na_2S_2O_3标准溶液:0.1M 其余试剂均为分析纯,用时以去离子水稀至所需浓度。 WFD-Y_2型原子吸收分光光度计,附WF-3对数转换器(北京第二光学仪器厂)
Many methods for the determination of thiosulfate, the most widely used iodometric method. However, it is still very interesting to study new methods, especially the indirect determination by atomic absorption spectrometry. The author’s research shows that the determination of silver in the filtrate by atomic absorption spectrometry can be used to determine thiosulfate indirectly through AgCl_ (solid) + S_2O_3 ~ (2 -) AgS_2O_3 ~ + Cl ~ - multiphase reaction. Test part of a reagent and apparatus 6201 red carrier: 20 ~ 40 mesh AgNO_3, NaCl solution: 0.5M Na_2S_2O_3 standard solution: 0.1M other reagents are of analytical grade, dilute to the desired concentration with deionized water. WFD-Y_2 atomic absorption spectrophotometer, with WF-3 logarithmic converter (Beijing Second Optical Instrument Factory)