title: Rapid uranium preconcentration and separation method from fresh water samples for total U and 235U/238U isotope ratio measurements by ICP-MS.
abstract: A simple and rapid method using TRU resin cartridges (Eichrom Technologies, Inc., USA) and quadrupole ICP-MS for total uranium (U) and 235U/238U isotope ratio measurements in fresh water samples was investigated. After U extraction on the resin by sample solution loading, three alkaline reagents, tetramethyl ammonium hydroxide (TMAH), NaOH and NH4OH were studied for U elution behavior from the resin cartridges and applicability of these eluates was evaluated with respect to direct introduction to ICP-MS. Among the studied eluants, TMAH showed the best results with high U recovery and no counting interferences with internal standard elements such as thallium and bismuth. Moreover, U in water samples was separated from many major and minor elements with the TRU cartridges. Almost all U was concentrated in 10 mL of 0.014 M TMAH in 2 h using 200 mL of water sample.
authors.affiliation: Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan. k tagami@nirs.go.jp
authors.forename: K
authors.initials: K
authors.lastname: Tagami
authors.forename: S
authors.initials: S
authors.lastname: Uchida
mesh_terms: D013058:Mass Spectrometry / Q000379:methods*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012015:Reference Standards; D014501:Uranium / Q000737:chemistry* / Q000302:isolation & purification; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*
chemical_list: D000644:Quaternary Ammonium Compounds; D014875:Water Pollutants, Radioactive; D014501:Uranium; C027917:tetramethylammonium