我国部分省份环境气溶胶中239+240Pu的测定  

Determination of 239+240Pu in environmental aerosols from some provinces in China

作　　者：李鹏翔[1] 李周[1] 张静[1] 王瑞俊[1] 韩玉虎[1] 任晓娜[1] LI Pengxiang;LI Zhou;ZHANG Jing;WANG Ruijun;HAN Yuhu;REN Xiaona(China Institute for Radiation Protection,Taiyuan 030006)

机构地区：[1]中国辐射防护研究院

出　　处：《辐射防护》2019年第6期451-455,共5页Radiation Protection

摘　　要：采用阴离子交换树脂分离结合α谱仪测量的方法对我国7个省份环境气溶胶中^239+240Pu含量进行测定,实验全程回收率为60.8%~94.6%,对气溶胶中^239+240Pu的最小可探测限为0.008μBq/m^3。普通环境气溶胶采样量需要达到30000 m^3以上,在应急情况等特殊环境气溶胶采样量为10000 m^3可满足要求。一般情况下气溶胶中^210Po含量比^239+240Pu高4~6个数量级,在分析和测量中要关注^210Po对^239+240Pu测量的影响。测量结果显示,我国普通省份环境气溶胶中^239+240Pu含量为0.009~0.099μBq/m^3,与美国、韩国和西班牙等国家空气气溶胶中的Pu含量处于同一水平。The contents of^239+240Pu in the environmental aerosols from seven provinces in China were analyzed using anion exchange resin separation andαspectrometer.Their total recovery rates were 60.8%-94.6%.The minimum detectable limit of^239+240Pu in aerosols was 0.008μBq/m^3.The sampling volume of aerosol in common environment needs more than 30000 m^3.In emergency and other special situations the aerosol sampling volume of 10000 m^3 will be enough.The ^210Po content in aerosol is 4-6 orders of magnitude higher than^239+240Pu.In this analysis,we should pay attention to the influence of^210Po on^239+240Pu measurement.Our experimental results show that the contents of^239+240Pu in the common environmental aerosols in China are 0.009-0.099μBq/m^3,the Pu content in air aerosols in China is the same level as that in the United States,South Korea and Spain.

关 键 词：气溶胶 示踪法 ^239+240Pu ^210Po影响 

分 类 号：X831[环境科学与工程—环境工程]