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实验比较了几种季鏻盐制备碳酸根离子电极,以长链季鏻盐十六烷基三苯基鏻制备的电极性能为佳.Nerstian响应区间为1×10~(-2)～6.3×10~(-7)mol·dm~(-3),检测下限为1.8×10~(-7)mol·dm~(-3).采用三氟乙酰特丁苯作为介体溶剂,改变了通常的离子选择性序列.介体溶剂与电极响应的主离子在膜相的强溶剂化作用有利于改善电位响应的选择性.
Experiments comparing several quaternary phosphonium salt prepared carbonate ion electrode, long-chain quaternary phosphonium salt cetyltriphenylphosphonium prepared electrode performance is better.Nerstian response range of 1 × 10 -2 to 6.3 × 10 -7 mol · dm -3 and the lower limit of detection was 1.8 × 10 -7 mol · dm -3 .Using trifluoroacetyltoluene as mediator solvent, The strong solvation of the main ions in the membrane phase by the mediator solvent and the electrode helps to improve the selectivity of the potential response.