Journal
ARCHAEOMETRY
Volume 50, Issue -, Pages 371-385Publisher
WILEY
DOI: 10.1111/j.1475-4754.2007.00351.x
Keywords
Sr isotope analysis; laser ablation; ICP-MS; tooth enamel; ancient nubia
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Trace element and Sr isotope data were obtained by laser ablation- and solution mode-(MC)-ICP-MS analysis for tooth enamel from remains excavated at the New Kingdom period Egyptian colonial and Nubian cemetery site of Tombos (Sudan). Elemental abundances determined by both methods of ICP-MS analysis yielded comparable values; however, Sr-87/Sr-86 values obtained by laser ablation were higher compared to their solution mode counterparts. This discrepancy is related to the production of a molecular interference-Ca + P + O (overlaps Sr-87); hence the higher Sr-87/Sr-86 values recorded during ablation analyses. Laser ablation studies of enamel may provide relatively precise Sr-87/Sr-86 values rather quickly but cannot be used for accurately deciphering historical population migrations.
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