SciELO - Scientific Electronic Library Online

vol.17 issue1Why are carbon molecular sieves interesting?Developing a continuous flow-square wave voltammetry method for determination of atrazine in soil solutions using the hanging mercury drop electrode author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of the Brazilian Chemical Society

Print version ISSN 0103-5053On-line version ISSN 1678-4790


LEMOS, Valfredo A.; SANTOS, Juracir S.  and  BALIZA, Patrícia X.. Me-BTABr reagent in cloud point extraction for spectrometric determination of copper in water samples. J. Braz. Chem. Soc. [online]. 2006, vol.17, n.1, pp.30-35. ISSN 0103-5053.

A new preconcentration method using cloud point approach is proposed for copper determination. The reagent 2-[2´-(6-methyl-benzothiazolylazo)]-4-bromophenol (Me-BTABr) was used as a complexing agent and Triton X-114 was added as a surfactant. After phase separation, dilution of the surfactant-rich phase with acidified methanol was performed, and the copper content was measured by flame atomic absorption spectrometry. The proposed procedure allowed the determination of copper with detection limit of 1.08 µg L-1. The validation of the procedure was carried out by analysis of certified reference material. The method was successfully applied to copper determination in river and well water samples.

Keywords : Me-BTABr; cloud-point extraction; copper; FAAS.

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


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