このエントリーをはてなブックマークに追加
ID 33025
フルテキストURL
著者
Sabarudin, Akhmad Department of Chemistry, Faculty of Science, Brawijaya University
大島 光子 Department of Chemistry, Faculty of Science, Okayama University
Noguchi, Osamu Department of Chemistry, Faculty of Science, Okayama University
本水 昌二 Department of Chemistry, Faculty of Science, Okayama University
抄録

A chitosan resin functionalized with 3-nitro-4-amino benzoic acid moiety (CCTS-NABA resin) was newly synthesized for the collection/concentration of trace molybdenum by using cross-linked chitosan (CCTS) as base material. The carboxyl group of the moiety was chemically attached to amino group of cross-linked chitosan through amide bond formation. The adsorption behavior of molybdenum as well as other 60 elements on the resin was examined by passing the sample solutions through a mini-column packed with the resin. After the elution of the elements collected on the resin with 1 M HNO3, the eluates were analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) and atomic emission spectrometry (ICP-AES).
The CCTS-NABA resin can adsorb several metal ions, such as vanadium, gallium, arsenic, selenium, silver, bismuth, thorium, tungsten, tin, tellurium, copper, and molybdenum at appropriate pHs. Among these metal ions, only molybdenum could be adsorbed almost completely on the resin at acidic regions. An excellent selectivity toward molybdenum could be obtained at pH 3-4. The adsorption capacity of CCTS-NABA resin for Mo(VI) was 380 mg g(-1) resin. Through the column pretreatment, alkali and alkaline earth metals in river water and seawater samples were successfully removed.
The CCTS-NABA resin was applied to the adsorption/collection of molybdenum in river water and seawater samples. The concentrations of molybdenum in river water samples were found in the range of 0.84 and 0.95 ppb (ng g(-1)), whereas molybdenum in seawater was about 9 ppb. The validation of the proposed method was carried out by determining molybdenum in the certified reference materials of SLRS-4, CASS-4, and NASS-5 after passing through the CCTS-NABA resin; the results showed good agreement with the certified-values.

キーワード
chitosan resin
3-nitro-4-amino benzoic acid
molybdenum
adsorption behavior
water and seawater
ICP-MS
ICP-AES
certified reference materials
備考
Published with permission from the copyright holder.
This is published in Talanta, 2007 Vol.73 Issue.5 pp.831-837
Publisher URL: http://dx.doi.org/10.1016/j.talanta.2007.04.057
Direct access to Thomson Web of Science record
(C)2007 by Elsevier B.V.
発行日
2007-05-22
出版物タイトル
Talanta
73巻
5号
開始ページ
831
終了ページ
837
資料タイプ
学術雑誌論文
言語
English
査読
有り
DOI
Web of Sience KeyUT
Submission Path
analytical_chemistry/37