A new cesium ion selective graphite rod electrode based on Cs-molybdophosphate

被引：21

作者：

Arida, HAM ^{[1
]}

Aglan, RF ^{[1
]}

El-Reefy, SA ^{[1
]}

机构：

[1] Atom Energy Author, Hot Lab Ctr, Cairo 13759, Egypt

来源：

ANALYTICAL LETTERS | 2004年 / 37卷 / 01期

关键词：

cesium selective electrode; Cs-12-molybdophosphate; coated graphite rod; potentiometric determination;

D O I：

10.1081/AL-120027771

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new poly(vinyl chloride) (PVC) electrode for Cs+ ion based on Cs-12-molybdophosphate (Cs-12-MPO) as a membrane carrier is prepared and characterized. The electrode exhibits a linear response with slope of 46.5 +/- 1 mV/decade within the concentration range of 1.0 x 10(-5)-1.0 X 10(-1) mol L-1 Cs+ ion. The limit of detection was 3.0 x 10(-6) mol L-1. The proposed electrode shows a good selectivity for Cs+ ion over a wide variety of other metal ions and could be used in the pH range of 4.0-6.0. It has a relatively fast response time less than (30 s) and can be used for at least three weeks without any considerable divergence in potentials. The proposed electrode is applied as a sensor for the determination of Cs+ ion concentration in some samples. The results show a good correlation with the data obtained by atomic absorption spectrometric method. The average recovery obtained is 92 +/- 0.5% with a standard deviation of 1.2%.

引用

页码：21 / 33

页数：13

共 37 条

[1] A COMPARATIVE-STUDY OF THE EFFECT OF ORTHO-NITROPHENYL OCTYL ETHER AND ORTHO-NITROPHENYL PENTYL ETHER AS PLASTICIZERS ON THE RESPONSE AND SELECTIVITY OF CARRIER-BASED LIQUID MEMBRANE ION-SELECTIVE ELECTRODES [J].