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Especiação de cobre e chumbo em sedimento do Rio Tubarão (SC) pelo método Tessier

2001; Brazilian Chemical Society; Volume: 24; Issue: 6 Linguagem: Inglês

10.1590/s0100-40422001000600005

1678-7064

Maria Carminati Lima, Maria Bertı́lia Oss Giacomelli, Volnei Stüpp, Fernanda D. Roberge, Pilar Bermejo–Barrera,

Analytical chemistry methods development

TESSIER SEQUENTIAL EXTRACTION PROCEDURE.The sequential extraction procedure proposed by Tessier and total digestion were applied for the analysis of sediment samples from Tubarão River.The recoveries were between 93.5 and 102.5% for Cu and 99.2 and 111% for Pb.The precision was tipically better than 6% for Cu and 3% for Pb.Comparison of the values obtained for the total digest with the sum of the extracted fractions showed that there were no significant losses in the extraction steps so that the method can be used for the monitoring availability and mobility of these analytes.According to ten points of sampling, was possible to determined the average of labiles phases (fractions 1 and 4) for Pb and Cu: 33.70% and 18.18%, respectively; and the inert phases (fraction 5residual): 66.30% for Pb and 81.82% for Cu.