【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)%。更多还原

【Abstract】 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.更多还原