基于α谱的尿中^(237)Np的测量方法  

Measurement of ^(237)Np in Urine Based on Alpha Spectrometer

作　　者：文雯 王孟 娄海林[2] 文富平[2] WEN Wen;WANG Meng;LOU Hai-lin;WEN Fu-ping(School of Nuclear Science and Technology,University of South China,Hengyang 421001,China;China Institute of Atomic Energy,P.O.Box 275(133),Beijing 102413,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]中国原子能科学研究院核安全研究所,北京102413

出　　处：《核化学与放射化学》2022年第5期558-564,I0004,共8页Journal of Nuclear and Radiochemistry

基　　金：中核集团集中研发项目(FA222512000206)。

摘　　要：^(237)Np属于高毒组核素,吸入人体后,会产生内照射危害。基于尿样中^(237)Np的分析测量既是常规监测的重要手段,也是研究职业工作人员人体^(237)Np剂量水平的关键方法,通过共沉淀预浓集,讨论了尿样中^(237)Np的前处理过程,系统地研究了TEVA萃取色谱树脂分离纯化和电沉积过程对^(237)Np化学回收率的影响。结果表明:该法对^(237)Np的化学回收率可达88.5%,方法检测限为2.55×10^(-5) Bq/L。该分析方法满足常规监测要求,适用于大体积尿样中^(237)Np的监测评价。^(237)Np is a highly toxic nuclide,which can cause internal exposure hazards after inhalation.The analysis of ^(237)Np based on urine samples is an important method for routine monitoring,as well as a key method for studying the dose level of ^(237)Np in the human body of professional workers.The pretreatment process of ^(237)Np in large-volume urine samples,pre-concentration by co-precipitation,and the effect of TEVA resin separation and purification and electrodeposition on the chemical recovery of ^(237)Np were systematically studied and discussed.The research results show that the chemical recovery of the experimental method can reach 88.5%,and the detection limit of the method is 2.55×10^(-5) Bq/L.This analysis method meets the requirements of routine monitoring and is suitable for monitoring and evaluating ^(237)Np in large-volume urine samples.

关 键 词：237 Np 尿样 Α谱仪 

分 类 号：X837[环境科学与工程—环境工程]