Speciation analysis of selenium in natural water using square-wave voltammetry after preconcentration on activated carbon

被引：48

作者：

Bertolino, Franco A. ^{[1
]}

Torriero, Angel A. J. ^{[1
]}

Salinas, Eloy ^{[1
]}

Olsina, Roberto ^{[1
]}

Martinez, Luis D. ^{[1
]}

Raba, Julio ^{[1
]}

机构：

[1] Natl Univ San Luis, Dept Chem, RA-5700 San Luis, Argentina

来源：

ANALYTICA CHIMICA ACTA | 2006年 / 572卷 / 01期

关键词：

selenium; activated carbon; preconcentration; square-wave voltammetry; cyclic voltammetry; natural water;

D O I：

10.1016/j.aca.2006.05.021

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple, accurate, sensitive and selective method was described for rapid determination of ultra-trace quantities of selenium. Selenium(IV) was collected on activated carbon (AC) after reduction to elemental Se by L-ascorbic acid. The collected selenium was then dissolved by oxidation reaction with bromate in acidic media and was indirectly determined through the bromide formation using square-wave voltammetry (OSWV). The total amount of Se(IV) and Se(VI) was collected on AC after its reduction by hydrazine. Selenium in the range 0.01-20 mu g L-1 could be determined by this method. The method was used to the determination of Se(IV) and Se(VI) in natural water with satisfactory results. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：32 / 38

页数：7

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