用改进的积分计数法测定水样中的222Rn。

Assay of 222Rn in water samples by a modified integral counting method.

作者信息

Murase Y, Homma Y, Murakami I, Handa K

机构信息

Laboratory for Radiopharmaceutical Chemistry, Kyoritsu College of Pharmacy, Tokyo, Japan.

出版信息

Appl Radiat Isot. 1998 Jul;49(7):861-5. doi: 10.1016/s0969-8043(97)10008-2.

DOI:10.1016/s0969-8043(97)10008-2

PMID:9570101

Abstract

22Rn activity concentrations in water collected from 163 private wells and 14 springs in Tokyo were measured with a liquid scintillation spectrometer using a modified integral counting method. The activity concentrations of 222Rn range from 0.2 to 22.9 Bq/L and average 4.8 Bq/L. The errors due to the air luminescence counts and the interferences from 220Rn and 219Rn are discussed and evaluated. 222Rn samples of 0.2 Bq/L can be assayed within an overall uncertainty of 3.1%. The liquid scintillation method involving agitation of the sample water directly with a liquid scintillation cocktail was compared with the present method and evaluated.

摘要

采用改进的积分计数法，使用液体闪烁光谱仪测量了从东京163口私人井和14个泉水中采集的水样中的22Rn活度浓度。222Rn的活度浓度范围为0.2至22.9 Bq/L，平均为4.8 Bq/L。讨论并评估了由空气发光计数引起的误差以及来自220Rn和219Rn的干扰。活度浓度为0.2 Bq/L的222Rn样品可以在3.1%的总不确定度内进行测定。将直接用液体闪烁鸡尾酒搅拌样品水的液体闪烁法与本方法进行了比较和评估。