分析化学におけるオニウム化合物の適用に関する研究(第7報) : テトラフェニル・フォスフォニウム・クロライドの蒼鉛イオンに対するポーラログラフ的挙動

概要

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In this experiment, tetraphenylphosphonium chloride, (C6H5)4PCl, is synthesized and its polarographic behaviors have been investigated. The reagent shows one-step reducing wave having a maximum wave at about -1.85V (vs. S. C. E.) which is difficult to be suppressed. The reagent, with the use of suitable complex ion-forming agents, showed to give precipitation reaction with the following metal ions; Hg2+, Cu2+, Cd2+, Bi3+, Sn2+, Sn4+, Sb3+, Co2+, Mn2+, Fe3+, Ni2+, Zn2+ etc., and anions such as I3-, SCN-, ClO4-, IO4-, BE4-, MnO4-, S2O82-, WO42-, MoO42-, Cr2O72-, VO43-, Fe(CN)63-, Fe(CN)64-, and Fe(C2O4)33-, also it reacts to form precipitates with various heteropoly acids. The reaction with Bis+ among above metal ions is especially sensitive and gives a complete precipitation polarographically. A successful result is obtained for amperometric titration of Bi3+ by use of the reagent and the determination is carried out within the error of ±1%.