Issue 2, 2005
From the journal:

Journal of Analytical Atomic Spectrometry

Application of multivariate technique in method development for the direct determination of copper in petroleum condensate using graphite furnace atomic absorption spectrometry

W. N. L. dos Santos,a   F. de S. Dias,a   M. S. Fernandes,a   M. V. Rebouças,b   M. G. R. Vale,c   B. Welzd  and  S. L. C. Ferreira*a  

* Corresponding authors

a Universidade Federal da Bahia, Instituto de Química, Salvador, Bahia 40170-290, Brasil
E-mail: slcf@ufba.br
Fax: 55-71-2355166

b Brasken, Unidade de Insumos Básicos Camaçari, Bahia 42810-000, Brasil

c Universidade Federal do Rio Grande do Sul, Instituto de Química Porto Alegre, Rio Grande do Sul 91501-970, Brasil

d Universidade Federal de Santa Catarina, Departamento de Química Florianópolis, Santa Catarina 88040-900, Brasil

Abstract

A method has been developed for the direct determination of copper in petroleum condensate using detergentless micro-emulsions (three-component solutions) and graphite furnace atomic absorption spectrometry. The optimization was performed using a three-level full factorial design, resulting in pyrolysis and atomization temperatures of 920 °C and 2600 °C, respectively. Using the secondary copper line at 327.4 nm, which is less affected by the magnetic field of the Zeeman-effect background correction system, a characteristic mass of 39 pg, and detection limit of 0.4 μg l−1 was obtained using 20 μl of micro-emulsion, which corresponds to 1.2 μg l−1 in petroleum condensate. The precision, expressed as relative standard deviation, was 2.0% or 2.8% for copper concentrations of 30 μg l−1 and 5.0 μg l−1, respectively. The spike recovery of 105% for copper added to a petroleum condensate sample proved that this procedure could be applied satisfactorily to a determination in this matrix.

Graphical abstract: Application of multivariate technique in method development for the direct determination of copper in petroleum condensate using graphite furnace atomic absorption spectrometry

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Article information

DOI
https://doi.org/10.1039/B414502J
Article type
Technical Note
Submitted
20 Sep 2004
Accepted
21 Dec 2004
First published
11 Jan 2005

J. Anal. At. Spectrom., 2005,20, 127-129

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Application of multivariate technique in method development for the direct determination of copper in petroleum condensate using graphite furnace atomic absorption spectrometry

W. N. L. dos Santos, F. D. S. Dias, M. S. Fernandes, M. V. Rebouças, M. G. R. Vale, B. Welz and S. L. C. Ferreira, J. Anal. At. Spectrom., 2005, 20, 127 DOI: 10.1039/B414502J

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