The concentration of the natural ultra-trace radionuclides CI and U in the uranium depended on the neutron flux.In this article,a method for measuring 36C1 and 236U in the same uranium mineral with accelerator mass sp...The concentration of the natural ultra-trace radionuclides CI and U in the uranium depended on the neutron flux.In this article,a method for measuring 36C1 and 236U in the same uranium mineral with accelerator mass spectrometry was developed in China Institute of Atomic Energy,providing a protocol of the potential application of 236U in uranium mining,environmental,and geological research.The two samples were from Guangxi and Shanxi province,China,and their ratios 36Cl/C1 and 236U/238U were measured.More experimental data conduced to understand the natural nuclides in the uranium mineral.We plan to conduct more efforts on the research.展开更多
建立一种准确测定铀矿中铼和钪含量的方法,为铀矿中伴生元素的分析与研究提供数据支持,对探勘铼钪矿实现战略资源合理利用化有着重大意义。采用氢氟酸-硝酸-盐酸-高氯酸四酸作溶剂、密闭聚四氟乙烯坩埚-电热板加热方式溶解样品,利用电...建立一种准确测定铀矿中铼和钪含量的方法,为铀矿中伴生元素的分析与研究提供数据支持,对探勘铼钪矿实现战略资源合理利用化有着重大意义。采用氢氟酸-硝酸-盐酸-高氯酸四酸作溶剂、密闭聚四氟乙烯坩埚-电热板加热方式溶解样品,利用电感耦合等离子体质谱(ICP-MS)法测定铀矿中铼和钪。通过探讨分解方法、称样量、酸用量、溶样温度及时间、基体干扰、内标选择的影响。结果表明,酸溶分解结果准确性高于碱熔分解,3 mL HF、4 mL HNO3、2 mL HCl和1 mL HClO4为最佳消解体系,0.05~0.10 g、10~12 mL为最佳称样量和酸用量,闭盖160℃、开盖190℃18 h为最佳溶样条件,选择碰撞气流速为3.0 mL/min,稀释气流速为0.8 L/min降低基体干扰,In作为内标能够达到测试要求。方法操作简单,其中铼和钪的检出限分别为0.002和0.122 mg/kg;铼准确度在92.9%~98.4%,相对标准偏差在2.4%~5.7%;钪准确度在93.5%~98.2%,相对标准偏差在1.6%~6.2%;铼加标回收率为87.2%~93.8%,钪加标回收率为90.7%~92.3%,检出限低,精密度良好,满足铀矿中铼和钪的分析要求。展开更多
基金Supported by National Natural Science Foundation of China(No.41166002)Guangxi Natural Science Foundation(No.2012GXNSFBA053004)+1 种基金Scientific Research Foundation of Guangxi Higher Education(No.201102ZD001)Scientific Research Foundation ofGuangxi University(No.XBZ100773)
文摘The concentration of the natural ultra-trace radionuclides CI and U in the uranium depended on the neutron flux.In this article,a method for measuring 36C1 and 236U in the same uranium mineral with accelerator mass spectrometry was developed in China Institute of Atomic Energy,providing a protocol of the potential application of 236U in uranium mining,environmental,and geological research.The two samples were from Guangxi and Shanxi province,China,and their ratios 36Cl/C1 and 236U/238U were measured.More experimental data conduced to understand the natural nuclides in the uranium mineral.We plan to conduct more efforts on the research.
文摘建立一种准确测定铀矿中铼和钪含量的方法,为铀矿中伴生元素的分析与研究提供数据支持,对探勘铼钪矿实现战略资源合理利用化有着重大意义。采用氢氟酸-硝酸-盐酸-高氯酸四酸作溶剂、密闭聚四氟乙烯坩埚-电热板加热方式溶解样品,利用电感耦合等离子体质谱(ICP-MS)法测定铀矿中铼和钪。通过探讨分解方法、称样量、酸用量、溶样温度及时间、基体干扰、内标选择的影响。结果表明,酸溶分解结果准确性高于碱熔分解,3 mL HF、4 mL HNO3、2 mL HCl和1 mL HClO4为最佳消解体系,0.05~0.10 g、10~12 mL为最佳称样量和酸用量,闭盖160℃、开盖190℃18 h为最佳溶样条件,选择碰撞气流速为3.0 mL/min,稀释气流速为0.8 L/min降低基体干扰,In作为内标能够达到测试要求。方法操作简单,其中铼和钪的检出限分别为0.002和0.122 mg/kg;铼准确度在92.9%~98.4%,相对标准偏差在2.4%~5.7%;钪准确度在93.5%~98.2%,相对标准偏差在1.6%~6.2%;铼加标回收率为87.2%~93.8%,钪加标回收率为90.7%~92.3%,检出限低,精密度良好,满足铀矿中铼和钪的分析要求。
