Preconcentration and Spectrophotometric Determination of Chromium (VI) and Total Chromium in Drinking Water by the Sorption of Chromium Diphenylcarbazone with Surfactant Coated Alumina
作者:
JamshidL. Manzoori*,
MohammadH. Sorouraddin,
Farzaneh Shemiran,
期刊:
Analytical Letters
(Taylor Available online 1996)
卷期:
Volume 29,
issue 11
页码: 2007-2014
ISSN:0003-2719
年代: 1996
DOI:10.1080/00032719608000807
出版商: Taylor & Francis Group
关键词: chromium speciation;diphenylcarbazide;spectrophotometry;sodium dodecyl sulphate;alumina
数据来源: Taylor
摘要:
A simple and inexpensive method for determining chromium (VI) in drinking water by spectrophotometry after preconcentration with sodium dodecyl sulphate (SDS) coated alumina column is described. Chromium(VI) is reacted with diphenylcarbazide (DPC) and the Cr-DPC complex is quantitatively adsorbed onto a SDS coated alumina column from 800 ml of sample solution. The complex is then eluted with a 8 ml mixture of methanol, acetone and hydrochloric acid and determined by spectrophotometry. Total chromium can be determined after oxidation of chromium (III) to chromium (VI) by KMnO4. The relative standard deviation (10 replicate analyses) at the 10 μg l−1of chromium (VI) and 10 μg l−1of total chromium were 3.5% and 3.4% and corresponding limits of detection (based on 3 σ) were 0.040 μg l−1and 0.033 μg l−1, respectively.
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