Determination of Cd(II), Cu(II) and Ni(II) in aqueous samples by ICP-OES after on-line preconcentration in column packed with silica modified with 2-aminothiazole
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Data
2008-01-01
Autores
Castro, Gustavo R. [UNESP]
Cristante, Valtair M. [UNESP]
Padilha, Cilene C. F. [UNESP]
Jorge, Sonia M. A. [UNESP]
Florentino, Ariovaldo O. [UNESP]
Prado, Alexandre G. S.
Padilha, Pedro M. [UNESP]
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Editor
Springer Wien
Resumo
This work describes the synthesis and characterization of 2-aminothiazole modified silica gel (SiAT) and the studies of adsorption and pre-concentration (in batch and using a flow-injection system coupled with optical emission spectrometer) of Cd(II), Cu(II) and Ni(II) in aqueous medium. The adsorption capacity for each metal ions in mmolg(-1) was: Cu(II) = 1.18, Ni(II) = 1.15 and Cd(II) = 1.10. The results obtained in the flow experiments showed about 100% of recovering of the metal ions adsorbed in a mini-column packed with 100 mg of SiAT, using 100 mu L of 2.0 mol L-1 HCl solution as eluent. The quantitative sorption-desorption of the metal ions made possible the application of a flow-injection system in the pre-concentration and quantification by ICP-OES of metal ions at trace level in natural water samples.
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Palavras-chave
pre-concentration, 2-aminothiazole, flow-injection system, sol-gel method, ICP-OES
Como citar
Microchimica Acta. Wien: Springer Wien, v. 160, n. 1-2, p. 203-209, 2008.