The determination of arsenic and selenium in coal by continuous flow hydride-generation atomic absorption spectrometry and atomic fluorescence spectrometry |
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Authors: | Les Ebdon John R Wilkinson |
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Institution: | Department of Environmental Sciences, Plymouth Polytechnic, Drake Circus, Plymouth, Devon PL4 8AA Great Britain |
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Abstract: | Concentrated perchloric acid is used to digest coal for subsequent determination of arsenic and selenium by hydride-generation atomic absorption and fluorescence spectrometry. Arsenic and selenium are removed from potentially interfering metal ions by coprecipitation with lanthanum hydroxide. The detection limits, 58 and 36 ng g?1 by atomic absorption and 25 and 10 ng g?1 by atomic fluorescence, for arsenic and selenium in coal, respectively, are adequate for the normal levels of these metals. |
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