ORIGINAL RESEARCH
Determination of Arsenic in Soil Extracts by
Flow-Through Anodic Stripping Coulometry
J. Laštincová, Ľ. Jurica, E. Beinrohr*
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Department of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology,
Radlinského 9, 812 37 Bratislava, Slovakia
Pol. J. Environ. Stud. 2004;13(5):533-536
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ABSTRACT
Flow-through coulometry was used for the determination of arsenic in soil extracts in 2 mol.dm-3 HCl
solution. Arsenic(III) species were deposited on gold plated porous working electrodes and then galvanostatically
stripped. The procedure was optimized and possible interferences were identified. The total As
content was determined after a reduction step in a microwave oven with hydrazine hydrochloride. The detection
limit was found to be 0.15 µg·dm-3 in the analyzed solution. A linear response range was achieved up
to As concentrations of several mg·dm-3. The procedure was applied for the analysis of soil extract samples
from three localities in Slovakia.