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Revista Cubana de Química

versão On-line ISSN 2224-5421

Resumo

SIBELLO-HERNANDEZ, Rita et al. Analytical Method for the Isotopic Characterization of Soils. Rev Cub Quim [online]. 2014, vol.26, n.1, pp.47-54. ISSN 2224-5421.

The aim of this work was to develop an analytical method in order to determine the isotopic composition of different elements in soil samples and to determine the existence of contamination. The method used in the digestion of the samples was the EPA 3050B, and some metal concentration were determined including uranium and thorium. For elements with even lower concentrations such as plutonium and radium a treatment after mineralization by EPA, was necessary. The measurement technique used was mass spectrometry with quadrupole and plasma induced associated (ICP-MS). Results of the analysis performed in two laboratories showed a good correspondence. This method allowed to perform the isotopic characterization of studied soils and results showed that the studied soils do not present any local pollution and that the presence of plutonium-239, is due to global fallout.

Palavras-chave : isotopic determination; alpha emitter; radionuclides; ICP-MS; soil contamination; Cuba.

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