Article ID Journal Published Year Pages File Type
582427 Journal of Hazardous Materials 2009 5 Pages PDF
Abstract
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 3σ criterion were 0.87 μg L−1 for Cr(III) and 1.18 μg L−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%).
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Health and Safety
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