Speciation of Cr(III) and Cr(VI) in potable waters by using activated neutral alumina as collector and ET-AAS for determination

被引：64
|
作者：
Sahayam, AC [1 ]
机构：
[1] Bhabha Atom Res Ctr, Natl Ctr Composit Characterisat Mat, ECIL PO, Hyderabad 500062, Andhra Pradesh, India
来源：
ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2002年 / 372卷 / 7-8期
关键词：
speciation; CR(III); CR(VI); activated neutral alumina; ET-AAS;
D O I：
10.1007/s00216-002-1261-7
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The speciation of Cr(III) and Cr(VI) has been performed by using activated neutral alumina as adsorbent. Both species were quantitatively adsorbed on a small column filled with neutral alumina. The adsorbed Cr(III) was eluted with 4 mol L-1 HNO3 and Cr(VI) with 1.0 mol L-1 ammonia solution. Recoveries of Cr(III) and Cr(VI) were 99% and 100%, respectively. Using ET-AAS for Cr determination the limit of detection in the sample was 0.01 mug L-1. The combined procedure is fast and sensitive. It can be applied for routine analysis of water samples at sub-mug L-1 levels with a relative standard deviation (RSD) of 2-10% (three determinations).
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页码：840 / 842
页数：3
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