Koji Oshita, Kenji Seo, Akhmad Sabarudin, Mitsuko Oshima, Toshio Takayanagi, Shoji Motomizu
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 -1 for measurement by ICP-AES coupled with 25-fold column preconcentration. © 2008 Springer-Verlag.
Department of International Conservation Studies for Cultural Properties, Faculty of Cultural Properties, Kibi International University, Takahashi, Okayama 716-8508, 8 Iga-machi, Japan; Department of Chemistry, Faculty of Science, Okayama University, Okayama 700-8530, 3-1-1 Tsushimanaka, Japan; Department of Chemistry, Faculty of Science, Brawijaya University, Malang, East Java 65145, MT Haryono 169, Indonesia
