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Title: Electrodeposition on pyrolytic graphite platforms for electrothermal atomic-absorption spectroscopic determination of labile lead in saline water
Authors: Juwadee Shiowatana
Jaroslav P. Matousek
Mahidol University
University of New South Wales (UNSW) Australia
Keywords: Chemistry
Issue Date: 1-Jan-1991
Citation: Talanta. Vol.38, No.4 (1991), 375-383
Abstract: A technique for the determination of labile Pb in sea-water has been developed which uses co-deposition with mercury on 6-14-mg pyrolytic graphite platforms, followed by electrothermal atomization of the deposit. Optimization of the applied voltage, pH and sodium chloride concentration with respect to the deposition efficiency yielded a detection limit of 0.15 μg/l. Pb for 120-sec depositions with a single platform. As the amount of deposit increases linearly with deposition time up to 5 min and the simultaneous use of two platforms increases the analytical signal by a factor of 1.73, a further improvement is possible. Near-shore sea-water and estuarine water samples containing lead in the concentration range 0.4-1.3 μg/l. were analysed with an RSD better than 10%. Background correction was not required as the technique eliminates spectral interferences due to molecular absorption. © 1991.
ISSN: 00399140
Appears in Collections:Scopus 1991-2000

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