De Alcântara, Ilton Luiz [UNESP]Dos Santos Roldan, Paulo [UNESP]Margionte, Maurício A. L. [UNESP]Castro, Gustavo R. [UNESP]Padilha, Cilene C. F. [UNESP]De Oliveira Florentino, Ariovaldo [UNESP]De Magalhães Padilha, Pedro [UNESP]2014-05-272014-05-272004-08-30Journal of the Brazilian Chemical Society, v. 15, n. 3, p. 366-371, 2004.0103-5053http://hdl.handle.net/11449/67834This work describes the synthesis and characterization of 2-aminothiazole modified silica gel (SiAT), and the results of a study of the adsorption and pre-concentration (in batch and using a flow-injection system coupled to an absorption atomic spectrometer) of Cu(II), Ni(II) and Pb(II) in aqueous medium. The adsorption capacities for each metal ions in mmol g -1 were: Cu(II)= 1.18, Ni(II)= 1.15 and Pb(II)= 1.10. The results obtained in the flow experiments showed a recovery of practically 100% of the metal ions adsorbed in a mini-column packed with 100 mg of SiAT, using 100 μL of 2.0 mol L -1 HCl solution as eluent. The sorption-desorption of the metal ions made possible the application of a flow-injection system for the pre-concentration and quantification by FAAS of metal ions at trace level in natural water samples digested and not digest by an oxidizing UV photolysis.366-371eng2-aminothiazole modified silica gelFAASPre-concentrationWater samples2 aminothiazole derivativecopperhydrochloric acidleadmetal ionnickelsilica geladsorptionaqueous solutionatomic adsorption spectrometerbatch processchemical analysischemical modificationconcentration (parameters)desorptionflow injection analysisoxidationphotolysisquantitative analysisspectrometersynthesisultraviolet radiationwater samplingArtigo10.1590/S0103-50532004000300005S0103-50532004000300005WOS:000221883800004Acesso aberto2-s2.0-41430860752-s2.0-4143086075.pdf6981448637456391