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1.引言离子选择电极在工业、农业、医学、环境科学等研究中应用广泛,但在萃取化学中的应用却报道很少。我们研制了PVC膜PdCl~(2-)离子选择电极,并用它考察溶液中萃取氯化钯的平衡。 1970年曾有人研制液膜PdCl_4~(2-)离子选择电极,这种电极只在一个数量级之间对PdCl_4~(2-)离子产生Nernst响应。我们研制的这种离子选择电极可在10~(-5)～10~(-3)M之间对PdCl_4~(2-)离子产生Nernst响应。将它应用于研究萃取平衡时,性能较理想,所得结论与文献相符。
1. Introduction Ion-selective electrodes are widely used in industrial, agricultural, medical, environmental science and other research, but the application of extraction chemistry has been reported very little. We developed a PVC membrane PdCl ~ (2-) ion selective electrode, and use it to examine the balance of palladium chloride solution. In 1970, a liquid film PdCl_4 ~ (2-) ion selective electrode was developed, which produced a Nernst response to PdCl_4 ~ (2-) ions only by an order of magnitude. The ion-selective electrode we developed produces a Nernst response to PdCl_4 ~ (2-) ions between 10 ~ (-5) and 10 ~ (-3) M. When it is used to study the extraction equilibrium, the performance is better and the conclusion is consistent with the literature.