Authors:
M. Vasconcellos CNEN/SP, Radiochemistry Division Instituto de Pesquisas Energeticas e Nucleares Caixa Postal 11049 CEP 05499 São Paulo SP Brazil

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V. Maihara CNEN/SP, Radiochemistry Division Instituto de Pesquisas Energeticas e Nucleares Caixa Postal 11049 CEP 05499 São Paulo SP Brazil

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D. Favaro CNEN/SP, Radiochemistry Division Instituto de Pesquisas Energeticas e Nucleares Caixa Postal 11049 CEP 05499 São Paulo SP Brazil

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M. Armelin CNEN/SP, Radiochemistry Division Instituto de Pesquisas Energeticas e Nucleares Caixa Postal 11049 CEP 05499 São Paulo SP Brazil

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E. Toro International Atomic Energy Agency Laboratory Seibersdorf P. O. Box 100 A-1400 Vienna Austria

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R. Ogris International Atomic Energy Agency Laboratory Seibersdorf P. O. Box 100 A-1400 Vienna Austria

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Abstract  

The present paper describes radiochemical separation procedures developed for the determination of the elements As, Cr, Hg, Sb and Se in biological reference materials. The methods chosen utilize ion exchange, retention on inorganic exchangers and solvent extraction techniques for the isolation of the elements of interest. These procedures are more rapid than previously used methods, such as distillation and precipitation. As to the sample dissolution, the following procedures were tested using radioactive tracers and reference materials: treatment of the materials in teflon bombs with a mixture of HNO3+H2SO4 or HNO3 only in a normal oven, and with HNO3 in a microwave oven using specially designed digestion bombs.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)