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KMID : 1059519990430040418
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Journal of the Korean Chemical Society
1999 Volume.43 No. 4 p.418 ~ p.422
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Selective Determination Method of Cr(Ⅲ) and Cr(Ⅵ) by Aliquat 336 Extraction and Flame Atomic Absorption Spectrometry
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Kim Cheon-Han
Hwang Hye-Ryeon
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Abstract
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A method is described for the selective determination of Cr(III) and Cr(VI) in aqueous solutios by flame atomic absorption spectrometry. Selective extraction of Cr2O72- was performed by Aliquat 336/NIBK from the mixtures of Cr3+ and Cr2O72-, and the extraction of Cr3+ was followed after complex complex formation with citrate by using the same extractant. The concentraction of each analyte in the extract was determined by N2O-C2H2 flame atomic absorption spectrometry. The recoveries of Cr+ and Cr2O72- from 50mL of aqueous solution ranging O.1∼1.0 μg/mL as Cr respectively by single extractions with 5 mL of 1%(V/V) Aliquat 336/MIBK were resulted as 98.8∼101.7%.
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KEYWORD
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