Sorption of uranium on freshly prepared hydrous titanium oxide and its utilization in determination of ²³⁶U using accelerator mass spectrometry

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• 作者：I. Špendlíková ; M. Němec ; P. Steier…
• 关键词：Titanium dioxide ; Uranium ; Target matrix ; Accelerator mass spectrometry ; 236U
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：311
• 期：1
• 页码：447-453
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1588-2780
• 卷排序：311

文摘

The determination of 236U with accelerator mass spectrometry (AMS) requires efficient separation methods with high concentration factors. The article proposes an alternative method of uranium separation from aqueous solutions to commonly used iron co-precipitation. This “homogeneous precipitation” is based on unique properties of fresh hydrous titanium oxide, prepared by hydrolysis of its organic precursor—tetra-n-butylorthotitanate—directly in the aqueous sample solution. Besides high uranium uptake, the results shows very promising properties of this uranium-titanium oxide precipitate for 236U-AMS measurements providing up to 4 times higher negative ion yield comparing with common uranium oxide matrix.