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ID 33020
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Author
Oshita, Koji
Noguchi, Osamu
Oshima, Mitsuko
Motomizu, Shoji
Abstract

A chelating resin, cross-linked chitosan modified with the glycine moiety (glycine-type chitosan resin), was developed for the collection and concentration of bismuth in aquatic samples for ICP-MS measurements. The adsorption behavior of bismuth and 55 elements on glycine-type chitosan resin was systematically examined by passing a sample solution containing 56 elements through a mini-column packed with the resin (wet volume; I ml). After eluting the elements adsorbed on the resin with nitric acid, the eluates were measured by ICP-MS. The glycine-type chitosan resin could adsorb several cations by a chelating mechanism and several oxoanions by an anion-exchange mechanism. Especially, the resin could adsorb almost 100% Bi(III) over a wide pH region from pH 2 to 6. Bismuth could be strongly adsorbed at pH 3, and eluted quantitatively with 10 ml of 3 M nitric acid. A column pretreatment method with the glycine-type chitosan resin was used prior to removal of high concentrations of matrices in a seawater sample and the preconcentration of trace bismuth in river water samples for ICP-MS measurements. The column pretreatment method was also applied to the determination of bismuth in real samples by ICP-MS. The LOD of bismuth was 0.1 pg ml(-1) by 10-fold column preconcentration for ICP-MS measurements. The analytical results for bismuth in sea and river water samples by ICP-MS were 22.9 +/- 0.5 pg ml(-1) (RSD, 2.2%) and 2.08 +/- 0.05 pg ml(-1) (RSD, 2.4%), respectively.

Note
Published with permission from the copyright holder.
This is published in Analytical Sciences, 2007 Vol.23 Issue.10 pp.1203-1208
Publisher URL: http://dx.doi.org/10.2116/analsci.23.1203
Direct access to Thomson Web of Science record
(C)2007 by The Japan Society for Analytical Chemistry
Published Date
2007-10-10
Publication Title
Analytical Sciences
Volume
volume23
Issue
issue10
Start Page
1203
End Page
1208
Content Type
Journal Article
language
英語
Refereed
True
DOI
Web of Science KeyUT
Submission Path
analytical_chemistry/50