摘要
目的为了提高水中总放射性检测的精密度和正确度,对检测项目系统开展方法验证和质量控制,提升实验室放射卫生和环境监测水平。方法采用总α分析的厚源法和总β分析的薄样法,对实际样品开展多次分析,计算检测方法的精密度;通过加标回收率实验和2019年全国放射卫生比对样品测试,进行方法的正确度分析。结果精密度实验中,相同样品多次分析的总α、总β结果相对标准偏差分别为23%和13%;3次加标回收率实验结果分别为103.1%、103.5%和105.8%;2019年全国水中总α、总β比对样品测量结果,与参考值的相对误差分别为0.92%和9.4%,体现了较高的正确度。结论方法验证和质量控制工作中的相对标准偏差、回收率、相对误差均在标准限制范围之内。这项工作系统介绍了水中总α、总β放射性检测可能引入误差的主要环节,进一步提高了放射卫生和环境放射性监测的水平。
Objective To improve the precision and accuracy of gross radioactivity detection in water,and to improve the radiological health and environmental monitoring level of each laboratory,it is necessary to carry out method verification and quality control.Methods The thick source method for grossαand the thin source method for grossβanalysis were used to analyze the actual samples.After multiple tests,the precision of the detection was calculated.Through the spike recovery test and the comparison sample analysis of the national radiological health in 2019,the accuracy analysis of the method was performed.Results In the precision experiment,the relative standard deviations of the grossαand grossβresults were 23%and 13%,respectively.The three spike recoveries were 103.1%,103.5%,and 105.8%,respectively.The relative errors of grossαand grossβcompared with the reference value were 0.92%and 9.4%,respectively.All the result reflected the high accuracy of the method.Conclusions The relative standard deviations,recoveries,and relative errors in the method validation and quality control were below the limits of the criterion.This work systematically discussed the major factors that may cause errors in the detection,which could further improve the level of radiological health and environmental monitoring.
作者
陈飞
张震
王雪涛
邵宪章
李玉文
Chen Fei;Zhang Zhen;Wang Xuetao;Shao Xianzhang;Li Yuwen(National Center for Occupational Safety and Health,National Health Commission of the People′s Republic of China,Beijing 102308,China;National Institute for Radiological Protection,China CDC,Beijing 100088,China)
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2020年第8期618-622,共5页
Chinese Journal of Radiological Medicine and Protection
基金
环境放射性研究网络中心国际合作项目(I-20-15)。
关键词
总α总β
质量控制
精密度
正确度
Grossαand grossβ
Quality control
Precision
Accuracy
