Souza, Érica SilvaMartins, Amarildo OtavioFajardo, Humberto VieiraProbst, Luiz Fernando DiasCarasek, Eduardo2015-04-092015-04-092008SOUZA, E. S. et al. Use of Al2O3 in an automated on-line pre-concentration system for determination of cadmium(II) by FAAS. Journal of Hazardous Materials, v. 150, p. 328-334, 2008. Disponível em: <http://www.sciencedirect.com/science/article/pii/S030438940700605X>. Acesso em: 02 fev. 2015.0304-3894http://www.repositorio.ufop.br/handle/123456789/4963This paper presents the development of an on-line pre-concentration system to determine cadmium(II) in aqueous samples. The analyte was trapped in a mini-column filled with Al2O3 in the form of macro-spheres obtained by the mixture of Al(NO3)3•9H2Oaq and chitosan dissolved in acetic acid. The mixture was dropped into an NH4OH aqueous solution under rigorous agitation using a peristaltic pump, the macro-spheres were separated from alkaline solution and dried, and finally were submitted to thermal treatment. The pre-concentration system was linear between 1.0 and 100 _gL−1, with a linearity of 0.999, sensitivity of 3.58×10−3 L_g−1 and enrichment factor of 21.9. The limits of detection and quantification were 0.08 _gL−1 and 0.28 _gL−1, respectively. The repeatability was between 2.6 and 5.9%. Recovery tests were carried out with a real aqueous sample.en-USAluminaPre-concentrationCadmium(II)Flame atomic absorption spectrometryArtigo publicado em periodicoO periódico Journal of Hazardous Materials concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3580760578368.https://doi.org/10.1016/j.jhazmat.2007.04.114