NBS urban particulate matter, SRM 1648, has been analyzed by a sequential extraction procedure to determine the chemical forms of P, AI, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn. High proportions of P, Cd, Co, Cu, Ni, Pb and Zn were found to be in soluble and/or exchangeable forms which are potentially readily bioavailable.
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Lum et al. (1982) studied this question.
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