关于气溶胶总放射性IAEA亚太地区国际比对的一些讨论

2015年亚太区域IAEA的ALMERA实验室举行了气溶胶总放射性和土壤伽马核素比对,参加比对的有来自11个国家的14个ALMERA实验室。其中气溶胶中总α仅有9个实验室报出数据,其通过率67%;气溶胶中总β有10个实验室报出数据,其通过率50%。气溶胶中总放射性较低的通过率应引起从事该项测量工作人员的重视。同时介绍了本实验室参加这次比对详细过程。通过气溶胶滤膜直接测量方法,总α和总β的相对偏差分别是2.50%、-3.95%,结果可接受,顺利通过该项比对活动,并从中总结了经验。

Some discussions about Asia-Pacific ALMERA group proficiency test and inter-comparison exercise on the determination of gross-alpha and gross-beta in filter

The 2015 Asia-Pacific Analytical Laboratories for the Measurement of Environmental Radioactivity (ALMERA) group proficiency test (PT) on the determination of Gross-alpha and Gross-beta and inter-comparison exercise on the gamma emitting radionuclides were conducted by IAEA, and participated in the PT of 14 ALMERA laboratories from 11 countries. The determination of Gross-alpha and Gross-beta is simpler than that of gamma emitting radionuclides. Gross-alpha and Gross-beta is measured separately, and there is no need to consider the mutual interference when measuring at the same time.Only 9 laboratories reported data with pass rate of 67% about the determination of Gross-alpha, and 10 laboratories reported data with pass rate of 50%.It is worthy of attention by those working in the survey.The article also introduced the detailed process of this experiment participating in this comparison. Through the direct measurement method of aerosol filter membranes, the relative deviations of total α and total β were 2.50% and -3.95%, respectively, and our laboratory successfully passed the comparison and summed up the experience from it.