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Thulium hydroxide: A new coprecipitant for speciation of chromium in natural water samples

Funda Armagan Aydin and Mustafa Soylak

J Hazard Mater 162(2-3):5 (2009) PMID 18621477

A coprecipitation procedure has been established for chromium speciation in natural water samples. The procedure is based on the coprecipitation of Cr(III) on thulium hydroxide precipitate. After reduction of Cr(VI) to Cr(III) by using potassium iodide, the presented method was applied to the determination of the total chromium. The level of Cr(VI) is calculated by difference of total chromium and Cr(III) levels. The procedure was optimized for some analytical parameters including pH, sample volume, matrix effects, etc. The detection limits based on 3@s criterion were 0.87@mgL^-^1 for Cr(III) and 1.18@mgL^-^1 for Cr(VI). The procedure presented was validated by the analysis of BCR-144R Sewage Sludge (domestic origin). The presented method was applied for the speciation of chromium in environmental sample with satisfactory results (recoveries>95%, R.S.D.s<10%).

Copyright © 2009 Elsevier Ltd. All rights reserved.

DOI: 10.1016/j.jhazmat.2008.06.011
Version: za2963e q8zae q8zb9 q8zc3 q8zd5 q8zef q8zf2 q8zgc

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