基于微波前处理技术快速测定生物样品中放射性核素的γ能谱方法  

Rapid determination of radionuclides by gamma spectrometry in biological samples using a microwave pretreatment technique

作　　者：徐晋 成丰 金晓祥 XU Jin;CHENG Feng;JIN Xiaoxiang(CGN Huizhou Nuclear Power Co.,Ltd.,Huizhou 516353,China;Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529941,China)

机构地区：[1]中广核惠州核电有限公司,惠州516353 [2]阳江核电有限公司,阳江529941

出　　处：《辐射研究与辐射工艺学报》2023年第6期98-107,共10页Journal of Radiation Research and Radiation Processing

基　　金：中国广核集团企业内部自研项目(2021-2022年)资助。

摘　　要：建立以大容量微波干燥碳化灰化一体装置为载体制备生物灰样、采用高纯锗γ能谱法直接测量生物灰样放射性核素的生物样品分析测定方法,实现核电厂周边环境生物样品中γ放射性核素活度浓度的快速测定。与传统灰样制备法对比研究结果表明:该微波灰样制备法可使生物样品制样效率提高约2~5倍,平行样相对偏差小于14.8%,加标回收率为87.0%~116%。采用配对t检验法验证,二者之间无显著性差异。该方法具有准确度高、分析效率高、操作简单、安全环保等优点,是快速测定生物样品中γ放射性核素活度浓度的理想方法。In this study,biological ash samples were prepared by establishing a high-capacity microwave integrated device for carbonizing and ashing.Radioactive nuclides in biologically derived ash samples using highpurity germanium gamma spectrometry were directly measured for rapid determination of γ radionuclide activity concentration in environmental bio-samples from nuclear power plant surroundings.A comparison with the traditional ash preparation method was also conducted.The results showed that the microwave-ash preparation method can improve the preparation efficiency of biological samples by approximately 2 to 5 times,with a relative deviation of less than 14.8% for parallel samples and a spike recovery rate ranging from 87.0% to 116%.A paired Ttest revealsed no significant difference between the two methods.The proposed method has the advantages of high accuracy,high analytical efficiency,simple operation,greater security,and environmental friendliness.It is an ideal method for quickly determiningγradionuclide activity concentration in biological samples.

关 键 词：微波灰样制备法 生物样品 Γ能谱 快速测定 

分 类 号：R14[医药卫生—公共卫生与预防医学]