Speciation of Cr(III) and Cr(VI) by means of melamine-urea-formaldehyde resin and FAAS

被引：43

作者：

Demirata, B ^{[1
]}

机构：

[1] Istanbul Tech Univ, Dept Chem, Fac Sci & Letters, TR-80626 Istanbul, Turkey

来源：

MIKROCHIMICA ACTA | 2001年 / 136卷 / 3-4期

关键词：

preconcentration; chromium(VI) and (III); speciation; FAAS; melamine-urea-formaldehyde resin;

D O I：

10.1007/s006040170044

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A method is described for the quantitative preconcentration and separation of trace chromium in water by adsorption on melamine-urea-formaldlehyde resin. Cr(VI) is enriched from aqueous solutions on the resin. After elution the Cr(VI) is determined by I;AAS. The capacity of the resin is maximal at similar to pH 2. Total chromium can be determined by the method after oxidation of Cr(III) to Cr(VI) by hydrogen peroxide. The relative standard deviations (10 replicate analyses) for 10mg/L levels of Cr(VI), Cr(III) and total chromium were 1.5, 3.5 and 2.8% respectively. The procedure has been applied to the determination and speciation of chromium in lake water, tap water and chromium-plating baths.

引用

页码：143 / 146

页数：4

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