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Valence States of Arsenic and Antimony in Sea Water

Valence States of Arsenic and Antimony in Sea Water A simple and convenient chemical procedure for the determination of As(III), As(V), Sb(III) and Sb(V) by thermal neutron activation analysis is proposed and applied to the study of the valence state of As and Sb in sea water. Immediately after sampling, As(III) and Sb(III) were separated from As(V) and Sb(V) by extracting their diethyldithiocarbamates with chloroform, and then back-extracted into diluted nitric acid. As(V) and Sb(V) in the aqueous phase were collected by thionalide cocrystallization. They were then irradiated for 30 min at a neutron flux of 2×1013 n/(cm2·s), and treated in the same manner as described in the previous report. The As and Sb were determined by gamma-ray spectrometry. Sea water has been found to contain 1.56–2.45 μg As/l and 0.37–0.60 μg Sb/l. 80–97% of arsenic and 70–94% of antimony existed as the pentavelent species, only 5–20% as the trivalent species, and the remainder was probably included in suspended matter. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the Chemical Society of Japan Oxford University Press

Valence States of Arsenic and Antimony in Sea Water

Gohda, Shiro
Bulletin of the Chemical Society of Japan , Volume 48 (4): 4 – Mar 27, 2006
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References (5)

Publisher
Oxford University Press
Copyright
© 1975 The Chemical Society of Japan
ISSN
0009-2673
eISSN
1348-0634
DOI
10.1246/bcsj.48.1213
Publisher site
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Abstract

A simple and convenient chemical procedure for the determination of As(III), As(V), Sb(III) and Sb(V) by thermal neutron activation analysis is proposed and applied to the study of the valence state of As and Sb in sea water. Immediately after sampling, As(III) and Sb(III) were separated from As(V) and Sb(V) by extracting their diethyldithiocarbamates with chloroform, and then back-extracted into diluted nitric acid. As(V) and Sb(V) in the aqueous phase were collected by thionalide cocrystallization. They were then irradiated for 30 min at a neutron flux of 2×1013 n/(cm2·s), and treated in the same manner as described in the previous report. The As and Sb were determined by gamma-ray spectrometry. Sea water has been found to contain 1.56–2.45 μg As/l and 0.37–0.60 μg Sb/l. 80–97% of arsenic and 70–94% of antimony existed as the pentavelent species, only 5–20% as the trivalent species, and the remainder was probably included in suspended matter.

Journal

Bulletin of the Chemical Society of Japan – Oxford University Press

Published: Mar 27, 2006

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