DEVELOPMENT OF POLYMERIC MEMBRANES FOR ZINC ION-SELECTIVE ELECTRODES

被引：21

作者：

FIEDLERLINNERSUND, U ^{[1
]}

BHATTI, KM ^{[1
]}

机构：

[1] UNIV LUND,DEPT ANALYT CHEM,S-22007 LUND 7,SWEDEN

来源：

ANALYTICA CHIMICA ACTA | 1979年 / 111卷 / 01期

关键词：

D O I：

10.1016/S0003-2670(01)93248-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Several polymeric membranes for zinc ion-selective electrodes have been investigated. By optimizing the choice of solvent mediator and ligand, selectivity for zinc ions can be obtained. The applicability of a theory proposing membrane selectivities as a result of both solvent and site properties is demonstrated. The concept of solubility parameters is used in discussing the detection limits obtained. The best electrode found is based on a PVC membrane containing the zinc salt of di(2-ethylhexyl)phosphoric acid dissolved in tri(2-ethylhexyl)phosphate. It is the first ion-selective electrode which responds primarily to zinc. The sensor, which has a lifetime of at least two months, is characterized by a rapid response, potential stability and good sensitivity caused by a super-Nernstian slope (43.8mV/p Zn); the detection limit is 4.5 ± 0.1 pZn. © 1979.

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页码：57 / 70

页数：14

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