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ID 33039
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Author
Katarina, Rosi Ketrin
Oshima, Mitsuko
Motomizu, Shoji
Abstract
A novel chelating resin using chitosan as a base material, ethylenediamine-type chitosan, has been synthesized for the first time in the present study, and applied to the collection/concentration of ultratrace amounts of silver in environmental water samples. In the present study, ultratrace amounts of silver collected on the resin were eluted and determined by ICP-MS. The resin packed in a 1 mL mini column could adsorb silver selectively and quantitatively at a flow rate of 2 mL min(-1) in the wide pH range from 1 to 8, and silver adsorbed on the resin could be easily recovered by passing 1 M nitric acid as an eluent into the column. High adsorption capacity for silver at pH 5, 0.37 mmol mL(-1) of the resin, was achieved, and t(1/2) of the adsorption is less than 5 min. The effect of chloride on the collection of silver was examined by varying chloride concentrations from 10(-4) to 0.75 M; the results showed that the present resin can be used for the collection/concentration of ultratrace amounts of silver in natural waters, as well as seawater. To ensure the accuracy and the precision of the method, CASS-4 near shore seawater reference material from the NRCC has been analyzed. This is not a certified SRM for silver, but has been used for comparative silver analysis by several groups, who report very similar results to those that are reported here. The developed method using ethylenediamine-type chitosan resin gives 0.7 pg mL(-1) of the detection limit when 50-fold enrichment was used. The proposed method was successfully applied to the determination of silver in tap, river, and seawater samples.
Keywords
Chelating resin
Chitosan
Determination of silver
Environmental water samples
ICP-MS
Note
Published with permission from the copyright holder.
This is a author's copy,as published in Analytica Chimica Acta , 2006 Vol.558 Issue.1-2 pp.246-253
Publisher URL: http://dx.doi.org/10.1016/j.aca.2005.11.010
Direct access to Thomson Web of Science record
(C) 2005 by Elsevier B.V.
Published Date
2006-02-03
Publication Title
Analytica Chimica Acta
Volume
volume558
Issue
issue1-2
Publisher
Elsevier Science B.V.
Start Page
246
End Page
253
ISSN
0003-2670
NCID
AA00524834
Content Type
Journal Article
language
英語
Copyright Holders
Elsevier Science B.V.
File Version
author
Refereed
True
DOI
Web of Sience KeyUT
Submission Path
analytical_chemistry/20