Quantitative aspects of the separation of arsenical species by free solution capillary electrophoresis |
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| Authors: | J F López-Sánchez M B Amram M D Lakkis F Lagarde G Rauret and M J F Leroy |
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| Institution: | (1) Department de Química Analítica, Universitat de Barcelona, Av. Diagonal 647, E-08028 Barcelona, Spain;(2) Laboratoire de Chimie Minérale et Analitique, URA 405 du CNRS, EHICS, 1, rue Blaise Pascal, F-67008 Strasbourg Cedex, France |
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| Abstract: | Capillary zone electrophoresis has been used for the separation of arsenite, arsenate, monomethylarsonic acid (MMA), dimethylarsinic acid (DMA) and phenylarsonic acid. The separation was achieved using a fused silica capillary filled with a phosphate buffer. The on-column U.V. detector was operated at 190 nm. The influence of voltage and injected volume, reproducibility of calibration and recovery from a drinking water sample were studied. Using the calibration plot method and phenylarsonic acid as internal standard the mean recoveries for arsenate, MMA and DMA were 104%, 97% and 97% respectively. |
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