Modification of electrothermal atomic absorption spectrometry for determination of arsenic in high salinity samples
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Date
2019-01-02
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Advisor
Referee
Mark
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Mendel University in Brno
Abstract
The electrothermal atomic absorption spectrometry (ET-AAS) method was optimized for
determination of the arsenic content in high salinity samples. The combination of palladium (1 g/l)
modifier, graphite furnace temperature program and graphite tube modified with tungsten carbide
significantly reduced the matrix interference in the sample with NaCl concentration of 10 g/l. Optimized
temperature program ensured the reduction of the background absorbance about 95–100%. The
modification of graphite furnace surface by tungsten carbides ensured the shift of background
absorbance prior to the absorbance of the analyte and considerable extension lifetime of graphite tubes.
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Peer-reviewed
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en
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(C) Mendel University in Brno