Evaluation of trace elements in lung samples from coal miners using neutron activation analysis |
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Authors: | Saiki Mitiko Saldiva Paulo H. N. Alice Sérgio Haertel |
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Affiliation: | 1.Radiochemistry Division, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, P.O. Box 11 049, CEP 05422-970, S?o Paulo, SP, Brazil ;2.Faculdade de Medicina-USP, Av. Dr Arnaldo 455, CEP 01246-903, S?o Paulo, SP, Brazil ;3.Caixa Postal 328, Criciuma, CEP 88801-230, Santa Catarina, Brazil ; |
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Abstract: | In this study, instrumental neutron activation analysis was applied to the determination of Sc, La, Ce, Nd, Sm, Eu, Tb, Yb, Lu, Hf, Th, and U in lung samples from miners working in coal mines located in the state of Santa Catarina, Brazil. These results were compared to those from a control group constituted of healthy individuals. The results showed that the elements determined exhibit considerable intersubject variability within a single group of individuals and the mean values of concentrations in miners’ lungs were higher than those of normal individuals. Lung samples presented U concentrations varying from 11 to 890 Μg/kg. Therefore, for some samples, the contribution of the uranium fission products in the analysis of La, Ce, Nd, and Sm was considered by determining the interference correction factors. The accuracy of the results was evaluated by analyzing certified reference materials. |
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Keywords: | Neutron activation analysis lungs lanthanides scandium thorium uranium hafnium coal mine |
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