Gomes, Luis A. de Melo [UNESP]Padilha, Pedro de Magalhães [UNESP]Moreira, José Celso [UNESP]Dias Filho, Newton L. [UNESP]Gushikem, Yoshitaka2014-05-272014-05-271998-12-01Journal of the Brazilian Chemical Society, v. 9, n. 5, p. 494-498, 1998.0103-5053http://hdl.handle.net/11449/65629This work describes the synthesis and characterization of 5-amino-1,3,4-thiadiazole-2-thiol modified silica gel (SiATT), and the results of a study of the adsorption and preconcentration (in batch, and in flow using a column technique) of Cd(II), Co(II), Cu(II), Fe(III), Ni(II), Pb(II) and Zn(II) in ethanol medium. The adsorption capacities for each metal ion were (in mmol g -1): Cd(II) = 0.11, Co(II) = 0.10, Cu(II) = 0.20, Fe(III) = 0.20, Ni(II) = 0.16, Pb(II) = 0.08 and Zn(II) = 0.12. The results obtained in the flow experiments, showed a recovery of ca. 100% of the metal ions adsorbed in a column packed with 2 g of SiATT, using 5 mL of 2.0 mol L -1 HCl solution as eluent. The sorption-desorption of the metal ions made possible the development of a preconcentration method and quantification by Flame AAS of metal ions at trace level in fuel ethanol.494-498eng5-amino-1,3,4-thiadiazole-2-thiol modified silica gelFuel ethanolPreconcentrationArtigo10.1590/S0103-50531998000500015S0103-50531998000500015WOS:000077494800014Acesso aberto2-s2.0-30428983742-s2.0-3042898374.pdf69814486374563910000-0003-4179-0574