SciELO - Scientific Electronic Library Online

 
vol.28 issue1Synthesis, characterization and thermal behaviour of solid state compounds of 2-chlorobenzylidenepyruvate with trivalent aluminium, gallium, indium and scandium metals author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Eclética Química

Print version ISSN 0100-4670On-line version ISSN 1678-4618

Abstract

MORAES, F. V.de et al. Determination of Cd (II) by FAAS in aqueous medium after preconcentration in line on a SiAT. Eclet. Quím. [online]. 2003, vol.28, n.1, pp.09-17. ISSN 0100-4670.  http://dx.doi.org/10.1590/S0100-46702003000100001.

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 mg 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.

Keywords : Preconcentration; 2-aminothiazole modified silica gel; flame atomic absorption spectrometry.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License