Determination of As(III) and total as in water by graphite furnace atomic absorption spectrometry after electrochemical preconcentration on a gold-plated porous glassy carbon electrode

Střelec, M., Čacho, F., Manová, A. and Beinrohr, E. Determination of As(III) and total as in water by graphite furnace atomic absorption spectrometry after electrochemical preconcentration on a gold-plated porous glassy carbon electrode Chemical Papers, Vol.61, No. 6, 2007, 452-456

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Střelec, M.
Čacho, F.
Manová, A.
Beinrohr, E.
Title Determination of As(III) and total as in water by graphite furnace atomic absorption spectrometry after electrochemical preconcentration on a gold-plated porous glassy carbon electrode
Journal name Chemical Papers
Publication date 2007
Year available 2007
Volume number 61
Issue number 6
ISSN 0366-6352
Start page 452
End page 456
Place of publication Poland
Publisher Versita
Collection year 2007
Language english
Subject 250000 Chemical Sciences
Abstract/Summary Arsenic(III) was preconcentrated in a flow-through electrochemical cell on a gold coated porous carbon electrode. On stripping, arsenic was eluted with diluted nitric acid and determined off-line by GF AAS. The deposition and stripping steps were optimized. The limit of detection and limit of quantification were found to be 1.9 µg L−1 and 6.4 µg L−1, respectively. The repeatability and reproducibility were found to be 5.3 % and 9.3 %, respectively. Total arsenic was determined after a microwave assisted chemical reduction of As(V) to As(III) making the procedure suitable for speciation analysis. The method was applied in analysis of water samples.
 
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