Minor and trace metal analysis of a solvent-refined coal by flameless atomic absorption |
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| Authors: | William M. Coleman Peggy Szabo David L. Wooton Harry C. Dorn Larry T. Taylor |
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| Affiliation: | Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Va. 24061, USA |
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| Abstract: | Solvent-refined coal (SRC), THF1-insoluble SRC, THF-soluble SRC and three of its ‘size-separated’ fractions have been analysed for eleven metallic elements via flameless atomic absorption spectroscopy. Prior to analysis each sample was wet ashed with equal quantities of concentrated H2SO4 and 30% H2O2. Matrix effects were compensated for by the method of standard additions and deuterium-arc background correction. Mg, Al, K and Fe were found in greatest concentration in all samples. The concentration of Pb and Cd was measurable only in THF-insoluble SRC. |
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