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]2014-05-202014-05-202008-01-01Microchimica Acta. Wien: Springer Wien, v. 160, n. 1-2, p. 203-209, 2008.0026-3672http://hdl.handle.net/11449/17643This 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.203-209engpre-concentration2-aminothiazoleflow-injection systemsol-gel methodICP-OESArtigo10.1007/s00604-007-0845-5WOS:000252484600020Acesso restrito69814486374563910000-0003-4179-0574