Journal
MICROCHEMICAL JOURNAL
Volume 110, Issue -, Pages 94-98Publisher
ELSEVIER
DOI: 10.1016/j.microc.2013.03.003
Keywords
Cadmium; Serum protein fractions; Cellulose acetate electrophoresis; Oxidized carbon nanotubes; ETAAS
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Funding
- Instituto de Quimica de San Luis from the Universidad Nacional de San Luis and Consejo Nacional de Investigaciones Cientificas y Tecnicas (UNSL-CONICET)
- Agencia Nacional de Promocion Cientifica (FONCYT)
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This work presents a sensitive and accurate method for Cd determination in serum protein fractions separated by cellulose acetate electrophoresis (CAE). The determinations were carried out by on-line solid phase extraction using oxidized carbon nanotubes coupled to electrothermal atomization atomic absorption spectrometry (ETAAS). The detection and quantification limits were 10 ng L-1 and 35 ng L-1 respectively with a precision of 4.0% as relative standard deviation. This procedure joined the simplicity of protein separation by CAE, the preconcentration properties of solid phase extraction using ox-CNT and the excellent sensitivity attainable by ETAAS. The method was applied to samples with biological relevance (humans and experimental rats). Our work demonstrated that Cd could be determined in serum protein fractions separated by electrophoresis with good accuracy using the proposed method. (C) 2013 Elsevier B.V. All rights reserved.
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