Application of sequential extraction with supercritical CO(2), subcritical H(2)O, and an H(2)O/CO(2) mixture for estimation of environmentally mobile heavy metal fractions in sediments.
Results from use of a new isolation procedure based on sequential extraction with supercritical CO(2), subcritical H(2)O, and an H(2)O/CO(2) mixture in the same supercritical fluid extractor have been compared with results from the BCR-recommended three-step sequential extraction procedure. The new procedure gives more detailed information about environmentally mobile fractions (water-soluble, bicarbonate-forming), and in less time (5-6 h), than the BCR procedure.
Department of Chemistry and Biochemistry, Szent István University, Gödöllö, Páter K. u. 1. 2103 Hungary. heltai@fau.gau.hu
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Heltai
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Fehér
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Percsich
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Barabás
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Fekete
D002245:Carbon Dioxide / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis*; D019015:Geologic Sediments / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D012015:Reference Standards; D014867:Water / Q000737:chemistry*
D004785:Environmental Pollutants; D019216:Metals, Heavy; D014867:Water; D002245:Carbon Dioxide