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

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

Author 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
Institution IPEN CNEN
Delft Univ Technol
Universidade Federal de São Paulo (UNIFESP)
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 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.
Keywords instrumental neutron activation analysis
mercury
selenium
biological samples
Language English
Date 2002-01-01
Published in Journal of Trace and Microprobe Techniques. New York: Marcel Dekker Inc, v. 20, n. 4, p. 527-538, 2002.
ISSN 0733-4680 (Sherpa/Romeo, impact factor)
Publisher Marcel Dekker Inc
Extent 527-538
Origin http://dx.doi.org/10.1081/TMA-120015614
Access rights Closed access
Type Article
Web of Science ID WOS:000179633000009
URI http://repositorio.unifesp.br/handle/11600/26718

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