Method for determining <sup>226</sup>Ra in water via liquid scintillation counting and its uncertainty evaluation

YIN Liangliang; ZHANG Yao; KONG Xiangyin; QIAN Yuxin; JI Yanqin

doi:10.11889/j.1000-3436.2022-0064

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Method for determining ²²⁶Ra in water via liquid scintillation counting and its uncertainty evaluation

RADIATION INTERDISCIPLINARY RESEARCH | 更新时间：2023-04-20

- Method for determining ²²⁶Ra in water via liquid scintillation counting and its uncertainty evaluation
  封面论文
- Journal of Radiation Research and Radiation Processing Vol. 41, Issue 2, Pages: 20701(2023)
- 作者机构：
  
  1.中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室北京 100088
  2.太原市疾病预防控制中心太原 030012
  3.中核战略规划研究总院有限公司北京 100048
- 作者简介：
  
  YIN Liangliang (female) was born in April 1979, and graduated from the Chinese Center for Disease Control and Prevention with her doctoral degree in 2019, majoring in radiochemical analysis, associate professor
  JI Yanqin, professor, doctoral supervisor, E-mail: jiyanqin@nirp.chinacdc.cn
- 基金信息：
  
  National Key Research and Development Project(2019YFC1604804)
- DOI：10.11889/j.1000-3436.2022-0064
  CLC：
扫描看全文
YIN Liangliang, ZHANG Yao, KONG Xiangyin, et al. Method for determining ²²⁶Ra in water via liquid scintillation counting and its uncertainty evaluation. [J]. Journal of Radiation Research and Radiation Processing 41(2):020701(2023)
DOI：

YIN Liangliang, ZHANG Yao, KONG Xiangyin, et al. Method for determining ²²⁶Ra in water via liquid scintillation counting and its uncertainty evaluation. [J]. Journal of Radiation Research and Radiation Processing 41(2):020701(2023) DOI： 10.11889/j.1000-3436.2022-0064.

摘要

通过建立以硫酸钡为载体共沉淀分离水中镭，液体闪烁计数法直接测量镭-226（,226,Ra）的方法，实现水中,226,Ra活度浓度的快速分析，并对方法不确定度进行评价。实验结果表明：该方法分析水中,226,Ra总效率为91.3%~98.5%，方法探测下限为0.01 Bq/L，相对扩展不确定度为7%（,k,=2），样品计数率和总效率引入的误差是水中,226,Ra不确定度的主要来源。该方法具有良好的精密度和准确度，适用于饮用水中,226,Ra的快速分析。

Abstract

An analytical method was developed for the rapid determination of ,226,Ra in water through liquid scintillation counting. The separation and purification of ,226,Ra from water were performed by co-precipitation using barium sulfate as the carrier; the direct measurement of ,226,Ra was realized by using a liquid scintillation spectrometer. Through sample analysis, a mathematical model for uncertainty evaluation was established and the sources of uncertainty were analyzed. The results showed that the overall counting efficiency of ,226,Ra is 91.3%-98.5%, the detection limit is 0.01 Bq/L, and the relative extended uncertainty is 7% (,k,=2), indicating that the proposed method is suitable for the rapid analysis of ,226,Ra in drinking water. The uncertainty of the method for the determination of ,226,Ra in water is mainly caused by the errors of sample counting rate and overall counting efficiency.

关键词

液体闪烁计数法水226Ra不确定度

Keywords

Liquid scintillation counter (LSC)Water sample226RaUncertainty

references

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中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室

China CDC Key Laboratory of Radiological Protection and Nuclear Emergency,National Institute for Radiological Protection, China CDC

⁰

Method for determining 226Ra in water via liquid scintillation counting and its uncertainty evaluation

DOI：10.11889/j.1000-3436.2022-0064

摘要

Abstract

关键词

Keywords

references

Method for determining ²²⁶Ra in water via liquid scintillation counting and its uncertainty evaluation