基于微滤法处理水样中226Ra的α能谱分析技术  

Determination of 226Ra in Water Sample via Micro-filtration Method by α Spectrometry

作　　者：梁永广 王元 於国兵 夏明明 顾先宝 范然 陈志 LIANG Yongguang;WANG Yuan;YU Guobing;XIA Mingming;GU Xianbao;FAN Ran;CHEN Zhi(School of Physics,University of Science and Technology of China,Hefei 230022,China;Cancer Hospital Affiliated to Zhengzhou University,Zhengzhou 450008,China;Anhui Radiation Environment Supervision Station,Hefei 230071,China)

机构地区：[1]中国科学技术大学物理学院,安徽合肥230022 [2]郑州大学附属肿瘤医院,河南郑州450008 [3]安徽省辐射环境监督站,安徽合肥230071

出　　处：《原子能科学技术》2020年第3期526-532,共7页Atomic Energy Science and Technology

基　　金：安徽省省级环境保护科研项目资助(2016-05)

摘　　要：Ra属于碱土族金属,易在人体骨骼中富集,对人体进行持续的内照射,准确测量样品中的226 Ra有非常重要的意义。本研究以224Ra作为示踪剂,通过Pb(Ra)SO4载带预富集、Ba(Ra)SO4共沉淀并采用真空微滤的方法制得226Ra的α微滤源,在α能谱仪上测量加标水样中226Ra的活度。使用该方法测量226Ra加标溶液,测量结果相对偏差为0.4%~13.1%。此分析技术可为辐射监管部门快速监测核素226Ra提供一种新的技术方法。Ra,as an alkali native metal,is easily enriched in human skeleton,leading to continuous internal irradiation to the human body,so it is very important to accurately measure the 226Ra in water samples.224Ra was used as chemical tracer,and theαmicrofiltration source was prepared by preconcentration with Pb(Ra)SO4,Ba(Ra)SO4 co-precipitation and vacuum micro-filtration in this study.Water samples with 226Ra by adding standard solution were measured onαspectrometry.The relative deviation range of the measured value and the actual added value is from 0.4%to 13.1%.This analysis technology can provide a new technical method for the radiation supervision department to quickly monitor the radionuclide 226Ra.

关 键 词：α能谱 α微滤源 示踪剂224Ra 226RA 

分 类 号：TL99[核科学技术—核技术及应用] O657.4[理学—分析化学]