Analytical method for beta counting of <sup>137</sup>Cs in radioactive fallout

ZHEN Liying; QIN Hao; ZHU Shenhe; HE Gaopeng; LIANG Guoshuai; LI Meili; LI Qiaoqin; WANG Jiayue; LIN Shuqian

doi:10.3724/j.0253-3219.2025.hjs.48.250274

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Analytical method for beta counting of ¹³⁷Cs in radioactive fallout

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | 更新时间：2025-11-27

- Analytical method for beta counting of ¹³⁷Cs in radioactive fallout
- NUCLEAR TECHNIQUES Vol. 48, Issue 11, Article number: 110301(2025)
- 作者机构：
  
  广东省环境辐射监测与核应急响应技术支持中心广州 510305
- 作者简介：
  
  ZHEN Liying, female, born in 1984, graduated from Northeast Electric Power University with a master's degree in 2011, focusing on radiation environment monitoring, E-mail: 293595230@qq.com
- 基金信息：
- DOI：10.3724/j.0253-3219.2025.hjs.48.250274
  CLC： TL75⁺1
- Received：04 July 2025，
  
  Revised：2025-07-21，
  
  Published：15 November 2025
- 稿件说明：
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甄丽颖,覃浩,朱深河等.沉降物¹³⁷Cs β计数法的分析方法研究[J].核技术,2025,48(11):110301.

ZHEN Liying,QIN Hao,ZHU Shenhe,et al.Analytical method for beta counting of ¹³⁷Cs in radioactive fallout[J].NUCLEAR TECHNIQUES,2025,48(11):110301.
甄丽颖,覃浩,朱深河等.沉降物¹³⁷Cs β计数法的分析方法研究[J].核技术,2025,48(11):110301. DOI： 10.3724/j.0253-3219.2025.hjs.48.250274. CSTR： 32193.14.hjs.CN31-1342/TL.2025.48.250274.

ZHEN Liying,QIN Hao,ZHU Shenhe,et al.Analytical method for beta counting of ¹³⁷Cs in radioactive fallout[J].NUCLEAR TECHNIQUES,2025,48(11):110301. DOI： 10.3724/j.0253-3219.2025.hjs.48.250274. CSTR： 32193.14.hjs.CN31-1342/TL.2025.48.250274.

摘要

该研究通过消解体系选择实验、磷钼酸铵吸附体系选择实验、硝酸-氯化铵洗涤剂替代实验、干扰消除实验等，参考国家环境保护标准HJ 816―2016中的仪器刻度和碘铋酸铯沉淀制源方法，结合低本底α/β测量仪进行样品测量，建立了一种适用于沉降物中

137

Cs的β计数法。研究人员采用该方法与GB/T 16145―2022对沉降物样品进行比对分析，方法比对结果显示，两者无显著性差异。在方法验证实验中，该方法的精密度和正确度分别满足HJ 61―2021中对平行样相对偏差（≤30%）和加标回收率（80%~120%）的要求，典型条件下探测下限可达1.2×10

-4

Bq·m

-2

·d

-1

。鉴于目前国内尚缺乏针对沉降物中

137

Cs的β计数法分析方法标准，该研究可为相关标准体系建设提供技术参考。

Abstract

Background

There is no standard for the analysis method of beta (β) counting method for

137

Cs in radioactive fallout in China.

Purpose

This study aims to establish a reliable β counting method for

137

Cs detection in fallout samples.

Methods

Firstly

a series of experiments

including digestion system selection experiment

ammonium phosphomolybdate adsorption system selection experiment

nitric acid-ammonium chloride detergent substitution experiment

and interference elimination experiment were conducted. Then

referring to the instrument scale and cesium iodobismuthate precipitation source preparation method in "State Environmental Protection Standars: HJ 816―2016"

and combining with low-background α/β measuring instruments for sample measurement

a β counting method suitable for

137

Cs in fallout was established. Finally

comparative analysis of this method with the GB/T 16145—2022

method was performed for verification.

Results

Comparative analysis results showed no significant differences in sedimentation sample detection. Validation experiments demonstrated that the method met precision (relative deviation of parallel samples ≤30%) and accuracy (recovery rate of spiked samples ranges from 80% to 120%) requirements specified in HJ 61―2021

with lower detection limit of 1.2×10

-4

Bq·m

-2

·d

-1

under typical conditions.

Conclusions

Experimental results demonstrate the viability of the β counting method for

137

Cs in fallout samples proposed in this study

providing technical references for the construction of relevant standard systems.

关键词

Keywords

references

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Analytical method for beta counting of 137Cs in radioactive fallout

DOI：10.3724/j.0253-3219.2025.hjs.48.250274

摘要

Abstract

关键词

Keywords

references

Analytical method for beta counting of ¹³⁷Cs in radioactive fallout