PVC-based membranes of N,N′-dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane as Pb(II)-selective sensor

被引：319

作者：

Gupta, V. K. ^{[1
]}

Jain, A. K. ^{[1
]}

Kumar, Pankaj ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Roorkee 247667, Uttar Pradesh, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2006年 / 120卷 / 01期

关键词：

potentiometric sensor; lead sensor; ion-selective electrodes;

D O I：

10.1016/j.snb.2006.02.019

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new poly(vinyl chloride) membrane sensor for Pb(II) ions based on N,N'-dibenzyl-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (I) as an ionophore was prepared. The sensor exhibits a Nernstian response for lead ions over a wide concentration range of 8.2 x 10(-6) to 1.0 x 10(-1) M with a slope of 30.0 +/- 0.1 mV/decade of activity. It has a fast response time of about 10s and can be used for at least 3 months without any divergence in potential. The electrode can be used in the pH range 2.0-6.8. The proposed sensor shows fairly good discriminating ability towards lead ions in comparison with some alkali, alkaline earth, transition and heavy metal ions. It was successfully applied for the direct determination of Pb(II) ions in solution and as an indicator electrode in potentiometric titration of lead ions with EDTA. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：259 / 265

页数：7

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