Flow-injection chemiluminescence detecting sulfite with in situ electrogenerated Mn3+ as the oxidant

被引：18

作者：

Zheng, XW ^{[1
]}

Zhang, ZJ ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Dept Chem, Xian 710062, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2002年 / 84卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

chemiluminescence; flow-injection analysis; sulfite in situ electrogenerated Mn(III);

D O I：

10.1016/S0925-4005(02)00015-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

By designing a novel flow-through electrolytic cell, the Mn3- was firstly in situ generated electrochemically on the near surface of the platinum electrode by constant current oxidizing MnSO4 in H2SO4 medium. It was then found that this Mn3- could oxidize sulfite, which was injected into the electrolytic cell, to produce the strong chemiluminescence (CL) emission signal. Based on this observation, a novel CL method for sulfite is developed in this paper. Under the optimum conditions developed, the CL emission intensity was linear with sulfite concentration in the range 3.0 x 1.0(-7) to 1.0 x 10(-4) mol/l (r = 0.9998). The detection limit was 8.0 x 10(-8) mol/l original concentration. The method was successfully used for the determination of SO2 in the air sample. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：142 / 147

页数：6

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