Flow-injection chemiluminescence determination of sulfite using on-line electrogenerated silver(II) as the oxidant

被引：21

作者：

Li, BX ^{[1
]}

Zhang, ZJ ^{[1
]}

Wu, ML ^{[1
]}

机构：

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

来源：

ANALYTICA CHIMICA ACTA | 2001年 / 432卷 / 02期

关键词：

flow injection; chemiluminescence; sulfite; on-line electrogenerated Ag(II);

D O I：

10.1016/S0003-2670(00)01377-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel chemiluminescence (CL) flow system for the determination of sulfite is described. It is based on the direct CL reaction of sulfite and silver(II) in acid media without any sensitizers. The unstable Ag(II) is on-line electrogenerated via a positive Pt-electrode from AgNO3 in HNO3 medium by constant current electrolysis, resulting in the elimination of the inconvenience of its instability to water. The CL intensity emission intensity was linear with sulfite concentration in the range 4 x 10(-7)-1 x 10(-5) mol/l; the detection limit was 1.7 x 10(-7) mol/l (3 sigma). The system was applied satisfactorily to the determination of sulfite dioxide in air. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：311 / 316

页数：6

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