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应用碱性染料研制ClO_4~-电极已见文献,报导,其中以文献为最佳。本文以乙基紫-ClO_4~-离子缔合物为活性材料研制了PVC膜ClO_4~-电极,其制作工艺较为简便,避免了使用对人体有害的硝基苯;除达到了文献所示的电极性能指标外,我们还进一步测定了电极内阻、响应时间、稳定性、重现性和更多的阴离子电势选择性系数等,均获得较满意结果;应用此电极作为指示电极进行了ClO_4~-氯化四苯鉮和IO_4~-氯化四苯鉮等体系的电势滴定,其滴定曲线在终点附近有明显的转折。
Alkaline dye developed ClO_4 ~ - electrode has been reported, reported, of which the best literature. In this paper, the PVC film ClO_4 ~ - electrode was prepared by using ethyl violet-ClO 4 - ion complex as the active material, and its production process was relatively simple, avoiding the use of nitrobenzene harmful to human body. In addition to reaching the electrode In addition, the electrode resistance, response time, stability, reproducibility and more selectivity coefficients of anionic potential were further measured. All the results obtained were satisfactory. The electrode was used as an indicator electrode for ClO 4 - Potentiometric titration of tetraphenylphosphonium chloride and IO_4 ~ - tetraphenylbenzene and other systems, the titration curve in the vicinity of the end of a significant turning point.