固相萃取法测定气溶胶中^(210)Pb的可行性分析  

Feasibility Study about SPE Analytical of ^(210)Pb in Aerosol

作　　者：毛万冲[1] 李斌[1] 张莉[1] 周伟 罗茂丹 MAO Wan-chong;LI Bin;ZHANG Li;ZHOU Wei;LUO Mao-dan(Sichuan Management ＆ Monitoring Center Station of Radioactive Environment,Chengdu,Sichuan 611139,China)

机构地区：[1]四川省辐射环境管理监测中心站,四川成都611139

出　　处：《环境监测管理与技术》2018年第4期50-53,共4页The Administration and Technique of Environmental Monitoring

基　　金：四川省环境保护科技计划课题"放射性废物处理设施及周围辐射环境监测技术研究"基金资助项目(20160103)

摘　　要：采集大气气溶胶中的^(210)Pb,气溶胶滤膜样品经高温灰化后加入^(206)Pb作为^(210)Pb分析的稳定同位素载体,用强碱性阴离子交换树脂在盐酸体系下吸附铅,将洗脱出的铅以硫酸铅沉淀形式称重。放置6个^(210)Bi(T_(1/2)=5 d)的半衰期后,至^(210)Pb和^(210)Bi平衡,在低本底α/β计数器上测定其子体^(210)Bi的计数,计算得出原始样品中^(210)Pb的活度浓度。该方法已广泛应用于四川省内环境质量监测和铀矿冶污染源监测等项目。^210 Pb in atmospheric aerosol was collected by filter and made into ashes at high temperature, ^206 Pb was added as stable isotope carrier into the samples, Pb was adsorbed by strong alkaline anion exchange resin in hydrochloric acid system, the eluted Pb was weighted in the form of PbSO 4 precipitate, after six half-lives of ^210 Bi（ T 1/2 =5 d）till ^210 Pb and ^210 Bi achieved balance, the activity concentration of Pb in original sample was calculated by counting its daughter ^210 Bi with low background alpha/beta counter. The method was widely used in environmental quality monitoring and pollution source monitoring in uranium mining industry in Sichuan.

关 键 词：^210PB 固相萃取法 铅载体 气溶胶 

分 类 号：X837[环境科学与工程—环境工程]