Abstract
Anion-exchange HPLC has been combined with hydride generation – atomic absorption spectrometry (HG-AAS) for the routine speciation of arsenite, arsenate, monomethylarsenic acid and dimethylarsinic acid. The sensitivity of the AAS-detection was increased by a post-column reaction system to achieve complete formation of volatile arsines from the methylated species and arsenate. The system allows the quantitative determination of 0.5 μg/l of each arsenic compound in water samples. The stability of synthetical and natural water containing arsenic at trace levels was investigated. To preserve stored water samples, a method for quantitative separation of arsenate at high pH-values with the basic anion-exchange resin Dowex 1×8 was developed.
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Stummeyer, J., Harazim, B. & Wippermann, T. Speciation of arsenic in water samples by high-performance liquid chromatography-hydride generation-atomic absorption spectrometry at trace levels using a post-column reaction system. Fresenius J Anal Chem 354, 344–351 (1996). https://doi.org/10.1007/s0021663540344
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DOI: https://doi.org/10.1007/s0021663540344