Determination of mercury and selenium in biological samples by neutron activation analysis

Determination of mercury and selenium in biological samples by neutron activation analysis

Autor Vasconcellos, MBA Google Scholar
Catharino, MGM Google Scholar
Paletti, G. Google Scholar
Saiki, M. Google Scholar
Bode, P. Google Scholar
Favaro, DIT Google Scholar
Baruzzi, R. Google Scholar
Rodrigues, D. A. Google Scholar
Instituição IPEN CNEN
Delft Univ Technol
Universidade Federal de São Paulo (UNIFESP)
Resumo Nuclear analytical techniques, specially neutron activation analysis (NAA) have been for a long time giving important contribution to trace element studies in the life sciences, due to their accuracy, precision, non-destructive and multielemental capabilities. in the present paper, instrumental neutron activation analysis (INAA) was applied to the. determination of Hg and/or Se in several types of biological samples such as hair, nails, fish reference materials and also in selenium supplements. the hair samples analyzed were collected from a control group and mainly from Indian populational groups living in the Amazonic region, where very high Hg contents were found (means from 3.6 to 21.8 mug g(-1)), probably due to gold exploration activities and biomass burning. A comparison was made of INAA for Se using two different radioisotopes: the short-lived Se-77m (t(1/2) = 17.45 s) and the long-lived one Se-75 (t(1/2) = 119.8 d). Both methods were applied to determination of Se in samples of hair, nails and vitamin supplements.
Palavra-chave instrumental neutron activation analysis
mercury
selenium
biological samples
Idioma Inglês
Data de publicação 2002-01-01
Publicado em Journal of Trace and Microprobe Techniques. New York: Marcel Dekker Inc, v. 20, n. 4, p. 527-538, 2002.
ISSN 0733-4680 (Sherpa/Romeo, fator de impacto)
Publicador Marcel Dekker Inc
Extensão 527-538
Fonte http://dx.doi.org/10.1081/TMA-120015614
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000179633000009
Endereço permanente http://repositorio.unifesp.br/handle/11600/26718

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