| TEVA树脂分离-ICP-MS测量钍基体中微量铀 |
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| 引用本文： | 史万龙,马付银,李峥,张岚. TEVA树脂分离-ICP-MS测量钍基体中微量铀[J]. 核化学与放射化学, 2015, 37(2): 89-93. DOI: 10.7538/hhx.2015.37.02.0089 |
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| 作者姓名： | 史万龙 马付银 李峥 张岚 |
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| 作者单位： | 1.中国科学院大学，北京100049；2.中国科学院 上海应用物理研究所 放射化学与工程技术部，上海201800；3.中国科学院 钍基熔盐堆核能系统卓越创新中心，上海201800；4.中国科学院 核辐射与核能技术重点实验室，上海201800 |
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| 基金项目： | 国家自然科学基金青年基金项目，中国科学院战略性先导科技专项 |
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| 摘 要： | 针对233 U提取工艺1AW钍基体中微量铀(m(Th)/m(U)=105)的分析,以TEVA树脂萃取色谱为主要分离纯化手段,以ICP-MS为测量手段,建立了一个简便快速的分析方法。上柱时模拟料液的体积为1mL、酸度为2.5mol/L,铀的洗脱液为12mL硝酸(2mol/L),方法对1AW模拟样品中铀的回收率为97.1%~100.0%,sr=1.1%(n=5)。该方法能够有效地将钍基体去除,从而实现微量铀的准确测量。
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| 关 键 词： | 铀 钍 TEVA树脂 ICP-MS |
Determination of Trace Uranium in Thorium by TEVA Extraction Chromatography Separation-ICP-MS |
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| SHI Wan-long,MA Fu-yin,LI Zheng,ZHANG Lan. Determination of Trace Uranium in Thorium by TEVA Extraction Chromatography Separation-ICP-MS[J]. Journal of Nuclear and Radiochemistry, 2015, 37(2): 89-93. DOI: 10.7538/hhx.2015.37.02.0089 |
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| Authors: | SHI Wan-long MA Fu-yin LI Zheng ZHANG Lan |
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| Affiliation: | 1.University of Chinese Academy of Sciences, Beijing 100049, China;2.Division of Radiochemistry and Engineering, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; 3.Chinese Academy of Sciences Center for Excellence in TMSR Energy System, Shanghai 201800, China; 4.Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Chinese Academy of Sciences, Shanghai 201800, China |
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| Abstract: | In this study, a chemical procedure for the routine determination of trace uranium in thorium has been developed. The simulated samples are leached with 2.5 mol/L nitric acid and separated using TEVA resin prior to ICP-MS measurements. The chemical recoveries of uranium in the method are 97.1%-100.0% (5 times), with 1 mL of stimulated samples and 12 mL of elution solutions (2 mol/L HNO3). The presence of thorium stripped together with uranium doesn’t interfere with the determination. This method not only circumvents “cumbersome” sample matrix change, but also employs only one and pretty simple eluant (diluent nitric acid), hence those simplifications greatly facilitate the separation efficiency than before. After appropriate diluting with water, the effluents can be directly injected into the mass spectrometer and determined with calibration curve. |
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| Keywords: | uranium thorium TEVA resin ICP-MS |
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