Lead ion selective PVC membrane electrode based on 5,5′-dithiobis-(2-nitrobenzoic acid)

被引:107
作者
Rouhollahi, A
Ganjali, MR
Shamsipur, M [1 ]
机构
[1] Razi Univ, Dept Chem, Kermanshah, Iran
[2] Univ Tehran, Dept Chem, Tehran, Iran
关键词
5,5 '-dithiobis-(2-nitrobenzoic acid); lead ion selective electrode; PVC membrane; potentiometry;
D O I
10.1016/S0039-9140(97)00421-9
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A PVC membrane electrode for lead ions based on 5,5'-dithiobis-(2-nitrobenzoic acid) as membrane carrier was prepared. The electrode exhibits a Nernstjan response for Pb2+ over a wide concentration range (1.0 x 10(-2)-4.0 x 10(-6) M). It has a relatively fast response time and can be used for at least 3 months without any divergence in potentials. The proposed electrode revealed good selectivities for Pb2+ over a wide variety of other metal ions and could be used in a pH range of 2.0-7.0. It was used as an indicator electrode in potentiometric titration of lead ions and in direct determination of lead in water samples. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1341 / 1346
页数:6
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