介体溶剂在碱金属PVC膜离子电极中选样性的研究

考察了不同介溶剂(苯基膦酸二正辛酯, 磷酸三丁酯, 硝基苯, 邻硝基苯正辛醚, 邻苯二甲酸二辛酯癸二酸二丁酯)的四苯硼酸盐PVC膜对碱金属离子的选择性, 探讨了不同介体溶剂的膜对选择性的影响. 所得结论与实验结果一致. 也就是硝基芳香族化合物介体溶剂适用于大半径碱金属离子, 而膦酸酯类介体溶剂适用于具有小离子半径的碱金属离子.

Study on selectivities of PVC membranes with different mediator solvents for alkali metal ions

With different mediator solvents, such as di(n-octyl) phenylphosphonate, tri-Bu phosphate, nitrobenzene, o-nitrophenyl n-octyl ether, dioctyl phthalate, and di-Bu sebacate, selectivities of PVC membranes for alkali metal ions were measured. The factors affecting selectivities of sensitive membranes were investigated by measuring equilibrium conductances of tetraphenylborates in different mediator solvents. The conclusions obtained agreed with experimental results. As a mediator solvent nitroaroms. are suitable for alkali metal ions with larger radii, and phosphonates are favorable for alkali metal ions with smaller radii.