Cobalt(II) ion-selective electrode with solid contact

被引：9

作者：

Wardak, Cecylia ^{[1
]}

机构：

[1] Marie Curie Sklodowska Univ, Fac Chem, Dept Analyt Chem & Instrumental Anal, PL-20031 Lublin, Poland

来源：

CENTRAL EUROPEAN JOURNAL OF CHEMISTRY | 2008年 / 6卷 / 04期

关键词：

Cobalt-selective electrode; Potentiometry; Chelating agent; Flow injection analysis;

D O I：

10.2478/s11532-008-0060-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new all plastic sensor for Co2+ ions based on 2-amino-5 (hydroxynaphtyloazo-1')-1,3,4 thiadiazole (ATIDAN) as ionophore was prepared. The electrode exhibits a low detection limit of 1.5 x 10(-6) mol L-1 and almost theoretical Nernstian slope in the activity range 4.0 x 10(-6)- 1 x 10(-1) mol L-1 of cobalt ions. The response time of the sensor is less than 10 s and it can be used over a period of 6 months without any measurable divergence in potential. The proposed sensor shows a fairly good selectivity for Co(II) over other metal ions. The electrode was successfully applied for determination of Co2+ in real samples and as an indicator electrode in potentiometric titration of Co2+ ions with EDTA.

引用

页码：607 / 612

页数：6

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