厚源法测量水中总α放射性
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摘要
采用厚源法测定地表水、废水中总α放射性,并通过6家实验室间比对验证厚源法的重复性、再现性和准确性。结果表明:方法探测下限不高于0.043 Bq/L。对总α放射性水平为0.046 Bq/L的地表水和25.6 Bq/L的废水样品重复性限为0.021 Bq/L和5.29 Bq/L,再现性限为0.022 Bq/L和8.69 Bq/L,加标回收率最终值为(104±17.6)%和(103±11.6)%。
Gross alpha activity in surface water and waste water was determined by thick source method. The repeatability, reproducibility and accuracy of the method were verified by six laboratories. The results showed the method lower detection limit was not more than 0.043 Bq/L. For the surface water with the gross alpha activity of 0.046 Bq/L and the waste water with the gross alpha activity of 25.6 Bq/L, the repeatability limits were 0.021 Bq/L and 5.29 Bq/L, the reproducibility limits were 0.022 Bq/L and 8.69 Bq/L, the end value of recoveries were(104±17.6)% and(103±11.6)%, respectively.
Gross alpha activity in surface water and waste water was determined by thick source method. The repeatability, reproducibility and accuracy of the method were verified by six laboratories. The results showed the method lower detection limit was not more than 0.043 Bq/L. For the surface water with the gross alpha activity of 0.046 Bq/L and the waste water with the gross alpha activity of 25.6 Bq/L, the repeatability limits were 0.021 Bq/L and 5.29 Bq/L, the reproducibility limits were 0.022 Bq/L and 8.69 Bq/L, the end value of recoveries were(104±17.6)% and(103±11.6)%, respectively.
引文
[1] 王丽琴,屈喜梅,焦玲,等.水中总α、β放射性测量概述[J].国际放射医学核医学杂志,2012,36(3):164-168.
[2] 环境保护部.HJ 493—2009 水质采样样品的保存和管理技术规定[S].北京:中国环境科学出版社,2009.
[3] 中国核工业总公司.EJ/T 1075—1998 水中总α放射性浓度的测定厚源法[S].北京:中国核工业总公司,1998.
[4] 解军,秦占波,王琨,等,环境监测实验室方法确认过程中常见问题探讨[J].环境监测管理与技术,2014,26(5):4-7.
[5] ISO.ISO 9696.Water quality—measurement of gross alpha activity in non-saline water—thick source method[S].Geneva:ISO,2007.
[6] 沙连茂,卫为强,宣义仁.放射性环境监测中探测限附近测量数据的处理[J].环境监测管理与技术,2006,18(1):38-43.
[7] 环境保护部.2017年国控网辐射环境监测质量保证方案[Z].北京:环境保护部,2017.
[2] 环境保护部.HJ 493—2009 水质采样样品的保存和管理技术规定[S].北京:中国环境科学出版社,2009.
[3] 中国核工业总公司.EJ/T 1075—1998 水中总α放射性浓度的测定厚源法[S].北京:中国核工业总公司,1998.
[4] 解军,秦占波,王琨,等,环境监测实验室方法确认过程中常见问题探讨[J].环境监测管理与技术,2014,26(5):4-7.
[5] ISO.ISO 9696.Water quality—measurement of gross alpha activity in non-saline water—thick source method[S].Geneva:ISO,2007.
[6] 沙连茂,卫为强,宣义仁.放射性环境监测中探测限附近测量数据的处理[J].环境监测管理与技术,2006,18(1):38-43.
[7] 环境保护部.2017年国控网辐射环境监测质量保证方案[Z].北京:环境保护部,2017.