Determination of aluminum as contaminant in dialysis concentrates by adsorptive cathodic stripping voltammetry

This paper describes a stripping voltammetric method for the determination of aluminum as contaminant in dialysis concentrates. It is based on the adsorptive deposition of the complex Al-1,2-dihydroxyanthraquinone-3-sulfonic acid (DASA) at the hanging mercury drop electrode (HMDE) at −0.9 V (versus...

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Bibliographic Details
Published in:Analytica chimica acta 2005-08, Vol.546 (1), p.79-84
Main Authors: de Carvalho, Leandro M., do Nascimento, Paulo C., Bohrer, Denise, Stefanello, Raquel, Bertagnolli, Denise
Format: Article
Language:English
Subjects:
Adsorptive stripping voltammetry
Aluminum
Analytical chemistry
Chemistry
Contamination
Dialysis concentrates
Electrochemical methods
Exact sciences and technology
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Summary:This paper describes a stripping voltammetric method for the determination of aluminum as contaminant in dialysis concentrates. It is based on the adsorptive deposition of the complex Al-1,2-dihydroxyanthraquinone-3-sulfonic acid (DASA) at the hanging mercury drop electrode (HMDE) at −0.9 V (versus Ag/AgCl) and its cathodic stripping during the potential scan. The method was optimized concerning the main electrochemical parameters that influence the voltammetric determination in highly saline solutions (sample dilution factor, deposition time and DASA concentration). The linear range for the measurements was from
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2005.05.010