高纯锗(HPGe)γ谱仪测定稀土萃取液中^(226)Ra的方法研究  

Determination of 226Ra in rare earth extract by high purity Germanium(HPGe)γspectrometer

作　　者：时燕华 刘念 刘觉晨 SHI Yanhua;LIU Nian;LIU Juechen(Jiangxi Provincial Geological Bureau,Nanchang Jiangxi 330001,China)

机构地区：[1]江西省地质局实验测试大队,江西南昌330001

出　　处：《江西化工》2022年第5期25-28,34,共5页Jiangxi Chemical Industry

基　　金：2021年江西省地质局科技创新项目(2022JXDZKJKY06)。

摘　　要：为提高测定稀土萃取液中^(226)Ra含量时的工作效率,本文采用HPGeγ能谱仪对样品稀土萃取液进行测量,用马林杯进行装样,对^(226)Ra第三代字体^(214)Pb能量为351.99keV的γ射线测量来得到^(226)Ra的放射性比活度,测量结果的相对标准偏差(RSD/%)为6.17,与国标中硫酸钡共沉淀射气法测镭的结果相比,相对误差在-9.1%~9.3%之间。对该方法进行加标回收率试验,加标回收率达107.4%~118.2%。该方法精密度、准确度和加标回收率均能满足生产需求。In order to improve the efficiency of the determination of ^(226)Ra content in rare earth extraction liquid,this paper uses HPGeγ-spectral method to measure the sample,using Marin cup for sample loading,with high purity Ge HPGeγ-spectrometer to ^(226)Ra third generation type ^(214)Pb energy of 351.99keVγ-ray measurement to get ^(226)Ra radioactivity specific activity.The relative standard deviation(RSD/%)of the measured results is 6.17,and the relative error is between-9.1%~9.3%compared with the Barium sulfate co-precipitation gas ejection method in the national standard.The recovery rate of this method was 117.8%~135.8%.The precision,accuracy and recovery rate of the method can meet the production requirements.

关 键 词：高纯锗HPGeγ谱仪 稀土萃取液 ^(226)Ra含量 

分 类 号：O657.62[理学—分析化学] TL817.2[理学—化学]