Title: An atomic absorption spectrometric method for the individual determination of chromium(III) and chromium(VI) by atomization of chromium from a chelating resin in a graphite tube
Abstract: A method for the determination of μg l−1 levels of chromium(III) and chromium(VI) by electrothermal atomic absorption spectrometry is described. Chromium(III) is quantitatively adsorbed onto Chelex-100 (<400 mesh) from 250 ml of sample solution (pH 4.0). After collection of the resin on a membrane filter, 5.0 ml of an aqueous suspension of the resin is prepared, and 10 μl is injected into a carbon furnace. The chromium peak area is measured. Chromium(VI) remains in the filtrate, and is completely reduced to Cr(III) with hydrochloric acid and hydrogen peroxide and measured as before. The relative standard deviations for 1.0 μg lt-1 Cr(III) and Cr(VI) are 2.3% and 3.7%, respectively.
Publication Year: 1983
Publication Date: 1983-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 33
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