Polyindole modified potassium ion sensor using dibenzo-18-crown-6 mediated PVC matrix membrane

被引：78

作者：

Pandey, PC ^{[1
]}

Prakash, R ^{[1
]}

机构：

[1] Banaras Hindu Univ, Dept Chem, Varanasi 221005, Uttar Pradesh, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 46卷 / 01期

关键词：

ion-selective electrode; conducting polymer; polyindole; potentiometry;

D O I：

10.1016/S0925-4005(97)00332-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A potassium ion-selective electrode using PVC matrix membrane impregnated with dibenzo-18-crown-6 at the surface of the polyindole modified electrode is reported. The electroactivity of the polyindole film contributing to the high selectivity of the neutral carrier based ion-sensor is analyzed based on the cyclic voltammetry. The polyindole modified electrode is formed by the electropolymerization of the indole monomer in dichloromethane containing tetrabutyl ammonium perchlorate (TBAP). A highly stable electroactive polyindole film is obtained. A neutral carrier impregnated PVC membrane is formed by casting over the surface of the polyindole modified electrode. The resulting ion-selective electrode without the incorporation of polyanions shows high reproducibility with negligible drift of the standard potential with a slope of 53 mV/decade. The lowest detection limit for the potassium ion sensor is 7.0 x 10(-6) mol dm(-3) with a wide linearity over almost five decades. A typical response of the neutral carrier impregnated PVC membrane over the polyindole modified electrode to the potassium ion is reported. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：61 / 65

页数：5

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