A fast response cadmium-selective polymeric membrane electrode based on N,N'-(4-methyl-1,2-phenylene)diquinoline-2-carboxamide as a new neutral carrier

被引：40

作者：

Rezaei, B. ^{[1
]}

Meghdadi, S. ^{[1
]}

Zarandi, R. Fazel ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Chem, Esfahan 8415684111, Iran

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 153卷 / 1-2期

关键词：

cadmium ion-selective electrode; PVC membrane; Mebqb; potentiometry; polyvinylchloride;

D O I：

10.1016/j.jhazmat.2007.08.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new polyvinylchloride membrane sensor for Cd2+ ions based on N,N-(4-methyl-1,2-phenylene)diquinoline-2-carboxamide (Mebqb) as a new and excellent neutral ionophore has been prepared. The sensor shows a Nernestian response for cadmium ions over a wide concentration range (1.0 x 10(-6) to 1.0 x 10(-1)M) with the determination coefficient of 0.9964 and slope of 29.9 +/- 0.5 mV decade(-1). The limit of detection is 8 x 10(-7) M. It has a fast response time of 3-8 s and can be used for at least 8 weeks without any divergence in potential. The electrode can be used in the pH range from 4.0 to 9.0. The proposed sensor shows a very good discriminating ability towards Cd2+ ion in comparison to some alkali, alkaline earth, transition and heavy metal ions. It was successfully applied for the direct determination of Cd2+ in standard and real sample solutions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：179 / 186

页数：8

共 47 条

[1] Novel solid-state cadmium ion-selective electrodes based on its tetraiodo- and tetrabromo-ion pairs with cetylpyridinium [J].