辐射防护2024，Vol.44Issue(z1)：41-45,5.
液闪萃取法测量水中镭-226的分析方法研究
Analytical method study for the determination of radium-226 in water by liquid scintillation counting
郭琛 1杨海兰 1杨有坤 1保莉 1苟荣霞 1王瑞俊 1廉冰1
作者信息
- 1. 中国辐射防护研究院国家环境保护辐射环境与健康重点实验室,太原 030006
- 折叠
摘要
Abstract
This paper studies a liquid scintillation counter measurement method for radium-226 in water.The method extracts radon-222,a daughter of radium-226,from water sample and enters into scintillation solution by means of insoluble scintillation liquid,thus realizes the separation of radon-222 from other interfering nuclides in water.After a period of time,when radium-226 and its daughter reached equilibrium,alpha/beta discrimination measurement was carried out by liquid scintillation counter to separate radon-222 and its alpha emmision daughters polonium-218 and polonium-214 from the beta emmision daughters bismuth-214 and lead-210,and indirectly obtains the activity concentration of radium-226 in the aqueous phase through the measurement of total alpha counts of radon-222,polonium-218 and polonium-214.The results indicated that the quench of liquid scintillation on the measurement of radium-226 in water is very low,and the Quantulus 1220 liquid scintillation counter has a measurement background of 0.02 cpm for this method,with a measurement efficiency of 2.52-2.60 and a minimum detection level of less than 2 mBq/L,which can meet the requirement for the measurement of radium in environmental samples.关键词
液闪/镭-226/α/β甄别测量Key words
LSC/radium-226/alpha/beta discrimination measurement分类
化学化工引用本文复制引用
郭琛,杨海兰,杨有坤,保莉,苟荣霞,王瑞俊,廉冰..液闪萃取法测量水中镭-226的分析方法研究[J].辐射防护,2024,44(z1):41-45,5.
