Induced metal-ion exchange in excavated human bone |
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Authors: | Joseph B Lambert Sharon Vlasak Simpson Susan Gorell Weiner Jane E Buikstra |
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Institution: | 1. Department of Chemistry, Northwestern University, Evanston, IL 60201, U.S.A.;2. Department of Anthropology, Northwestern University, Evanston, IL 60201, U.S.A. |
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Abstract: | Excavated human bone was exposed to aqueous solutions containing high concentrations of a single added metal ion in order to examine the extent of introduction of contaminating materials during burial. Variables included pH, temperature, ion concentration, state of bone (whole or crushed), structure of buffer, and counterion. Calcium and sodium showed little increase, and even a decrease in some cases. Strontium, zinc, lead, and magnesium showed large increases probably through heteroionic replacement of calcium. Manganese, aluminum, and potassium showed increases, particularly under neutral conditions, probably through infiltration into voids and defects. |
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Keywords: | atomic absorption woodland sites ancient diet hydroxyapatite heteroionic exchange bone diagenesis |
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