Determination of mercury and selenium in biological samples by neutron activation analysis
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Article
Date
2002
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Taylor and Francis
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Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Technische Universiteit Delft. Reactor Instituut Delft. Delft, Nederland.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Universidade Federal de São Paulo. Escola Paulista de Medicina. Departamento de Medicina Preventiva. São Paulo, SP, Brasil.
Universidade Federal de São Paulo. Escola Paulista de Medicina. Departamento de Medicina Preventiva. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Technische Universiteit Delft. Reactor Instituut Delft. Delft, Nederland.
Comissão Nacional de Energia Nuclear. Instituto de Pesquisas Energéticas e Nucleares. Divisão de Radioquímica. São Paulo, SP, Brasil.
Universidade Federal de São Paulo. Escola Paulista de Medicina. Departamento de Medicina Preventiva. São Paulo, SP, Brasil.
Universidade Federal de São Paulo. Escola Paulista de Medicina. Departamento de Medicina Preventiva. São Paulo, SP, Brasil.
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Abstract
Abstract
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 µg 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 ⁷⁷ᵐSe (t½ 17.45 s) and the long-lived one ⁷⁵Se (t½ 119.8 d). Both methods were applied to determination of Se in samples of hair, nails and vitamin supplements.
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Keywords in Portuguese
Região Amazônica, Parque Nacional do Xingu, Amostras Biológicas, Análise instrumental de ativação de nêutrons, Selenium
Keywords
Instrumental neutron activation analysis, Mercury, Selenium, Biological samples
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DeCS
Ecossistema Amazônico, Bancos de Espécimes Biológicos, Mercúrio, Selênio
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VASCONCELLOS, M. B. A. et al. Determination of mercury and selenium in biological samples by neutron activation analysis. Journal of Trace and Microprobe Techniques, v. 20, n. 4, p. 527-538, 16 Feb. 2002.
ISBN
ISSN
0733-4680
DOI
10.1081/TMA-120015614