痕量镎和钚的ICP-MS分析方法  

Determination of Trace Neptunium and Plutonium by ICP-MS

作　　者：吉艳琴[1] 李金英[2] 

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所,北京100088 [2]中国核工业集团公司,北京100822

出　　处：《核化学与放射化学》2008年第2期103-107,共5页Journal of Nuclear and Radiochemistry

摘　　要：经TOA萃取色层柱分离环境样品,2次上柱,将Np和Pu同时洗脱,239Pu的化学回收率为(92.7±3.1)%,237Np为(96.8±2.7)%,实现了ICP-MS同时测定痕量Np和Pu的含量。应用稀释剂242Pu,通过同位素稀释ICP-MS法测量痕量239Pu和240Pu的含量,用IAEA标样对方法进行验证,Pu的测定值与标样的推荐值吻合较好(标样中无Np的标准值),证明了ICP-MS同时测定痕量Np和Pu的可行性。A single TOA extraction chromatographic column with a two-stage sample loading was used to separate Np and Pu from the environmental samples.Preliminary studies were performed to determine both Np and Pu by ICP-MS in one run.The 239Pu recovery of（92.7±3.1）% and 237Np recovery of（96.8±2.7）% in environmental samples were obtained.By spiking with 242Pu,isotope dilution ICP-MS was applied to measure 239Pu and 240Pu.The feasibility for the determination of both Pu and Np was proved by analyzing IAEA-135 referenc samples. The measured values for Pu are in good agreement with recommended reference value （no Np standard value available）.

关 键 词：电感耦合等离子体质谱(ICP-MS) 环境样品 痕量 镎 钚 同位素稀释法 

分 类 号：O657.63[理学—分析化学]