Determination of Cd(II) by FAAS in aqueous medium after preconcentration in line on a SiAT.
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Data
2003-01-01
Autores
Moraes, F. V. de
Alcantara, I. L. de
Roldan, P. D.
Castro, G. R. de
Margionte, MAL
Padilha, P. D.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Editora Unesp
Resumo
This paper described the preparation of 2-aminothiazole modified silica gel (SiAT) and the results of a study of the sorption and preconcentration (in batch and in flow using a column technique) of Cd(II) in aqueous medium. The sorption capacities for metal ion was 1.12 mmol g-1. The results obtained in the flow experiments, showed a recovery of 98% of Cd(II) adsorbed in a column packed with 1 g of SiAT, using 5.0 mL of 2.0 mol L-1 hydrochloric acid as eluent. An enrichment factor of 25 (150 mL solution containing 25 dug L-1 of Cd(II), 5.0 mL concentrated) was obtained by this preconcentration procedure. The sorption-desorption of Cd(II) made possible the development of a preconcentration method and quantification:by Flame AAS of Cd(II) at trace level in aqueous samples.
Descrição
Palavras-chave
preconcentration, 2-aminothiazole modified silica gel, flame atomic absorption spectrometry
Como citar
Ecletica Quimica. Sao Paulo: Editora Unesp, v. 28, n. 1, p. 9-17, 2003.