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.
1. EGUIARTE I., ALONSO R.M., JIMÉNEZ R.M. Determination of total arsenic in soils by differential-pulse cathodic stripping voltammetry. Analyst 121, 1835, 1996.
2. KOPANICA M., NOVOTNY L. Determination of traces of arsenic(III) by anodic stripping voltammetry in solutions, natural waters and biological material. Anal. Chim. Acta 368, 211, 1998.
3. PRETTY J.R., BLUBAUGH E.A., CARUSO J.A. Determination of arsenic(III) and selenium(IV) using an on-line anodic stripping voltammetry flow cell with detection by inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry. Anal. Chem. 65, 3396, 1993.
4. VILTCHINSKAIA E.A., ZEIGMAN L.L., GARCIA D.M., SANTOS P.F. Simultaneous determination of mercury and arsenic by anodic stripping voltammetry. Electroanalysis 9, 633, 1997.
5. SUN Y.C., MIERZWA J., YANG M.H. New method of goldfilm electrode preparation for anodic stripping voltammetric determination of arsenic(III and V) in sea water. Talanta 44, 1379, 1997.
6. SANCHO D., VEGA M., DEBAN L., PARDO R., GONZALES G. Determination of copper and arsenic in refined beet sugar by stripping voltammetry without sample pretreatment. Analyst 123, 743, 1998.
7. JURICA E., MANOVA A., DZUROV J., BEINROHR E., BROEAKAERT J.A.C. Calibrationless flow-through stripping coulometric determination of arsenic(III) and total arsenic in contaminated water samples after microwave assisted reduction of arsenic(V). Fresenius J. Anal. Chem. 366, 260, 2000.
8. MRZLIAK R.I., BOND A.M., CARDWELL T.J., CAT- TRALL R.W., NEWMAN O.M.G., CHAMPION B.R., HEY L. Efficient procedures for the voltammetric determination of total arsenic in zinc and cadmium plant electrolyte process streams and in industrial effluents. Analyst 119, 1051, 1994.
9. SCHICKLING C., YANG J., BROEAKAERT J.A.C. Optimization of Electrochemical Hydride Generation Coupled to Microwave-induced Plasma Atomic Emission Spectrometry for the Determination of Arsenic and its Use for the Analysis of Biological Tissue Samples. J. Anal. Atom. Spectrom. 11, 739, 1996.
10. BUBNIK J. Voltammetric determination of small amounts of arsenic, antimony and tin in waters, leachate and materials with complex matrices. Chem. Listy 91, 200, 1997.
11. GREULACH U., HENZE G. Analysis of arsenic(V) by cathodic stripping voltammetry. Anal. Chim. Acta 306, 217, 1995.