The analytical biochemistry of chromium. | Zendy

Sidney Katz | Zendy

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The analytical biochemistry of chromium.

Author(s) -

Sidney Katz

Publication year - 1991

Publication title -

environmental health perspectives

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.257

H-Index - 282

eISSN - 1552-9924

pISSN - 0091-6765

DOI - 10.1289/ehp.919213

Subject(s) - chromium , hexavalent chromium , chemistry , nitric acid , sodium hydroxide , chromium compounds , sodium carbonate , hydrogen peroxide , extraction (chemistry) , hydroxide , environmental chemistry , inorganic chemistry , sodium , nuclear chemistry , chromatography , organic chemistry

The essentiality and carcinogenicity of chromium depend on its chemical form. Oxidation state and solubility are particularly important in determining the biological effects of chromium compounds. For this reason, total chromium measurements are of little value in assessing its nutritional benefits or its toxicological hazards. Aqueous sodium carbonate-sodium hydroxide solutions have been successfully used for extracting hexavalent chromium from a variety of environmental and biological matrices while preserving its oxidation state. Typical recoveries are 90 to 105% in samples spiked with both trivalent and hexavalent chromium. Determination of hexavalent chromium after extraction with sodium carbonate-sodium hydroxide solution, coupled with the determination of total chromium after nitric acid-hydrogen peroxide digestion, has been applied to the evaluation of chromium speciation in airborne particulates, sludges, and biological tissues.

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