Synthesis of chitosan resin possessing a phenylarsonic acid moiety for collection/concentration of uranium and its determination by ICP-AES
Synthesis of chitosan resin possessing a phenylarsonic acid moiety for collection/concentration of uranium and its determination by ICP-AES
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DOI：
10.1007/s00216-008-1931-1
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发表时间：
2008-02
影响因子：
4.3
通讯作者：
K. Oshita;Kenji Seo;A. Sabarudin;M. Oshima;T. Takayanagi;S. Motomizu
中科院分区：
文献类型：
--
作者：
K. Oshita;Kenji Seo;A. Sabarudin;M. Oshima;T. Takayanagi;S. Motomizu
研制了一种含有苯胂酸基团的壳聚糖树脂（苯胂酸型壳聚糖树脂），用于电感耦合等离子体（ICP）原子发射光谱法（AES）测定痕量铀。通过将其填充在微型柱中并用ICP质谱法测定流出物中的元素，系统地研究了52种元素的吸附行为。该树脂可以通过螯合机理吸附几种阳离子物种，并通过阴离子交换机理和/或螯合机理吸附几种含氧酸，如Ti（IV）、V（V）、Mo（VI）和W（VI）。特别是，U（VI）可以吸附几乎100%，在较宽的pH范围从pH 4至8。吸附的铀易于用1 M硝酸（10 mL）洗脱，采用所提出的柱分离方法可使铀富集25倍，可用于ICP-AES法测定海水中痕量铀。通过ICP-AES结合25倍柱预浓缩进行测量，检测限为0.1 ng mL− 1。
A chitosan resin possessing a phenylarsonic acid moiety (phenylarsonic acid type chitosan resin) was developed for the collection and concentration of trace uranium prior to inductively coupled plasma (ICP) atomic emission spectrometry (AES) measurement. The adsorption behavior of 52 elements was systematically examined by packing it in a minicolumn and measuring the elements in the effluent by ICP mass spectrometry. The resin could adsorb several cationic species by a chelating mechanism, and several oxo acids, such as Ti(IV), V(V), Mo(VI), and W(VI), by an anion-exchange mechanism and/or a chelating mechanism. Especially, U(VI) could be adsorbed almost 100% over a wide pH region from pH 4 to 8. Uranium adsorbed was easily eluted with 1 M nitric acid (10 mL), and the 25-fold preconcentration of uranium was achieved by using a proposed column procedure, which could be applied to the determination of trace uranium in seawater by ICP-AES. The limit of detection was 0.1 ng mL−1for measurement by ICP-AES coupled with 25-fold column preconcentration.