The gamma-spectrometry method of analyzing <sup>226</sup>Ra in water based on ferric hydroxide-calcium carbonate carrier

Huan QIN; Xinxin WANG; Kun TIAN; Bing XIA

doi:10.11889/j.0253-3219.2017.hjs.40.090302

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The gamma-spectrometry method of analyzing ²²⁶Ra in water based on ferric hydroxide-calcium carbonate carrier

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | 更新时间：2021-05-19

- The gamma-spectrometry method of analyzing ²²⁶Ra in water based on ferric hydroxide-calcium carbonate carrier
- NUCLEAR TECHNIQUES Vol. 40, Issue 9, Article number: 090302(2017)
- 作者机构：
  
  山东省核与辐射安全监测中心济南 250117
- 作者简介：
- 基金信息：
  
  Supported by Nuclear and Radiation Safety Supervision Foundation of China Environmental Protection Department
- DOI：10.11889/j.0253-3219.2017.hjs.40.090302
  CLC： TL922
- Received：30 March 2017，
  
  Revised：07 May 2017，
  
  Published：10 September 2017
- 稿件说明：
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Huan QIN, Xinxin WANG, Kun TIAN, et al. The gamma-spectrometry method of analyzing ²²⁶Ra in water based on ferric hydroxide-calcium carbonate carrier[J]. Nuclear techniques, 2017, 40(9): 090302
DOI：

Huan QIN, Xinxin WANG, Kun TIAN, et al. The gamma-spectrometry method of analyzing ²²⁶Ra in water based on ferric hydroxide-calcium carbonate carrier[J]. Nuclear techniques, 2017, 40(9): 090302 DOI： 10.11889/j.0253-3219.2017.hjs.40.090302.

摘要

建立了一种基于氢氧化铁-碳酸钙载带水中

226

Ra的γ能谱分析方法，适用于环境水中

226

Ra分析。在计算公式中，采用样品粉末质量修正因子和方法回收率对测量结果进行修正。通过对20 L水样的加标验证，本方法加标样的回收率高于83.0%，各组加标样回收率的平均值高于90.9%，准确度范围为2.05%-12.7%，精确度范围为3.20%-5.38%。利用无源效率刻度软件计算探测效率来确定探测下限和样品使用量的关系，得出采样量为40-60 L时最佳，此时探测下限为2.0 mBq·L

-1

左右。

Abstract

Background

It is difficult to measure

226

Ra in water accurately because of its low content. The existing three methods have the disadvantages such as complex sample processing

large measurement error and lower detection limit

and thus could not satisfy the measurement needs.

Purpose

This study aims to build a new gamma-spectrometry method to analyze

226

Ra in water simply and accurately with reasonable lower limit.

Methods

Ferric hydroxide calcium carbonate was used as carrier for

226

Ra in water.

Results

Experimental results shows that the spiked sample recovery rate by this method is higher than 83.0%

the average recovery of each group is higher than 90.9%

the accuracy range is 2.05%-12.7%

and the precision range is 3.20%-5.38%. The relationship between the detection limit and the usage of the sample is calculated using the sourceless efficiency calibration software. The best sample sizes are 40-60 L

and at this point the lower detection limit is about 2.0 mBq·L

-1

Conclusion

The results show that the method is accurate and reliable

which can be used to analyze and determine the content of

226

Ra in water.

关键词

Keywords

references

GB/T 16140-1995: 水中放射性核素的γ能谱分析方法[S]. 北京: 中国标准出版社, 1995.

GB/T 16140-1995:Analysis of radionuclides in water by γ-ray spectrometry[S]. Beijing:China Standard Press, 1995.

GB 11214-89: 水中镭-226的分析测定[S]. 北京: 中国标准出版社, 1989.

GB 11214-89:Determination of radium-226 in water[S]. Beijing:China Standard Press, 1989.

曹娟 , 李晓凤 , 吴贤海 . 射气闪烁法测定水中 226 Ra方法的改进 . 核技术 , 2015 . 38 ( 9 ): 090302 DOI: 10.11889/j.0253-3219.2015.hjs.38.090302 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.090302 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract469.shtml .

Juan CAO , Xiaofeng LI , Xianhai WU . Improvement of mensuration method of 226 Ra in water by emanationscintillation . Nuclear Techniques , 2015 . 38 ( 9 ): 090302 DOI: 10.11889/j.0253-3219.2015.hjs.38.090302 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.090302 http://www.j.sinap.ac.cn/hejishu/CN/abstract/abstract469.shtml .

GB 11218-89: 水中镭的α放射性核素的测定法[S]. 北京: 中国标准出版社, 1989.

GB 11218-89:Determination of alpha radionuclides in radium[S]. Beijing:China Standard Press, 1989.

ISO/DIS 13165-3:Water quality-measurement of radium-226 Part 3:test method using coprecipitation and gamma-spectrometry[S]. 2014.

GB/T 11713-2015: 高纯锗γ能谱分析通用方法[S]. 北京: 中国标准出版社, 2015.

GB/T 11713-2015:General analytical methods of high-purity germanium gamma spectrometer[S]. Beijing:China Standard Press, 2015.

EJ/T 900-94: 水中总β放射性测定蒸发法[S]. 北京: 中国核工业总公司, 1994.

EJ/T 900-94:Water total beta radioactivity determination evaporation method[S]. Beijing:China Nuclear Industry Corporation, 1994.

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The gamma-spectrometry method of analyzing 226Ra in water based on ferric hydroxide-calcium carbonate carrier

DOI：10.11889/j.0253-3219.2017.hjs.40.090302

摘要

Abstract

关键词

Keywords

references

The gamma-spectrometry method of analyzing ²²⁶Ra in water based on ferric hydroxide-calcium carbonate carrier