Atomic absorption spectrometry with electrothermal atomization to determine trace amounts of arsenic
Slovak University of Technology, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Radlinského 9, 812 37 Bratislava, Slovakia
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Abstract: The aim of this work was to develop an on-line coupling of electrochemical preconcentration to atomic absorption spectrometry method and to apply the developed system in the determination of ultra-trace amounts of As in water samples. A flow-through electrochemical analyzer EcaFlow (Istran Ltd, Bratislava, Slovakia) was used as the preconcentration unit with a two-electrode cell. The working electrode was a reticular vitreous carbon electrode coated with gold. An atomic absorption spectrometer SP9 with a graphite furnace atomizer (Pye Unicam) was used to determine the preconcentrated As species. Preconcentration parameters were optimized for the electrochemical process.
Keywords: arsenic, electrochemical preconcentration, GFAAS
Full paper in Portable Document Format: acs_0291.pdf
Acta Chimica Slovaca, Vol. 10, No. 2, 2017, pp. 175—179, DOI: 10.1515/acs-2017-0029