Abstract
A flow-injection system for the determination of inorganic arsenic [As(III)/As(V)] and selenium species [Se(IV)/ Se(VI)] by electrochemical hydride generation, cryogenic trapping and atomic absorption spectrometry is described. A simple and robust electrochemical flow-through cell with fibrous carbon as cathodic material has been developed for the speciation of arsenic. A cold-trap system makes possible to eliminate interferences from methylated arsenic species. Without pre-reduction the system is selective to As(III) and Se(IV). The selectivity obtained with fibrous carbon as cathode material is compared to the selectivity obtained with a second electrochemical flow-through cell using a lead foil as cathode.
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Received: 9 August 1998 / Revised: 17 September 1998 / Accepted: 24 September 1998
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Pyell, U., Dworschak, A., Nitschke, F. et al. Flow injection electrochemical hydride generation atomic absorption spectrometry (FI-EHG-AAS) as a simple device for the speciation of inorganic arsenic and selenium. Fresenius J Anal Chem 363, 495–498 (1999). https://doi.org/10.1007/s002160051232
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DOI: https://doi.org/10.1007/s002160051232