Potentiometric detection of inorganic anions and cations in capillary electrophoresis with coated-wire ion-selective electrodes

被引：45

作者：

Kappes, T ^{[1
]}

Schnierle, P ^{[1
]}

Hauser, PC ^{[1
]}

机构：

[1] UNIV BASEL,DEPT CHEM,CH-4056 BASEL,SWITZERLAND

来源：

ANALYTICA CHIMICA ACTA | 1997年 / 350卷 / 1-2期

关键词：

D O I：

10.1016/S0003-2670(97)00309-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The construction of coated-wire ion-selective electrodes of small size with two different PVC-based membranes is described. The electrodes are used as potentiometric end-column detectors for monovalent anions and alkali and alkaline earth metal cations separated by capillary electrophoresis. In comparison to conventional micropipette electrodes these all solid state electrodes showed a similar performance but much higher mechanical robustness and a longer lifetime which was found to be 9 and 8 days, respectively. Calibration curves for Cl- and Ca2+ demonstrate the wide dynamic range of these detectors and detection limits of lower than 10(-7) and 10(-8) M could be achieved using the electrostacking technique.

引用

页码：141 / 147

页数：7

共 16 条

[1] COATED WIRE ION SELECTIVE ELECTRODES [J].