Evaluation of a high sensitivity PbO2 pH-sensor

被引：11

作者：

Lima, AC ^{[1
]}

Jesus, AA ^{[1
]}

Tenan, MA ^{[1
]}

Silva, AFDS ^{[1
]}

Oliveira, AF ^{[1
]}

机构：

[1] Univ Mogi Cruzes, Lab Pesquisa Quim Analit & Fis Quim Nucl Ciencias, BR-08780911 Mogi Das Cruzes, SP, Brazil

来源：

TALANTA | 2005年 / 66卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

pH-sensor; PbO2-paraffin membrane; high sensitivity pH-electrode;

D O I：

10.1016/j.talanta.2004.11.027

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, a new high sensitivity potentiometric pH-electrode with a response in the acid region is proposed. It consists of a PbO2-paraffim matrix deposited on graphite. Its simple construction and studies of some variables at 0.5 mol L-1 ionic strength are reported. A direct relationship between the electric potential difference and the solution pH was observed for pH values ranging from 1.2 to 7.5. A slope greater than 100 mV/decade and a conditional electric potential of about 1250 mV were obtained. The results presented a high correlation with those from a conventional glass pH-electrode in complex matrix samples. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：225 / 228

页数：4

共 13 条

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