摘要
目的对粪样中超铀核素^(241)Am的分析测量方法进行研究,初步建立粪样中^(241)Am的分析方法,为工作人员内照射监测提供技术支持。方法利用自行研制的粪样取样器和碳化灰化炉对粪样采集处理;采用DGA树脂对粪样中^(241)Am进行分离纯化的方法研究,用^(243)Am为示踪剂并采用正交法进行条件优化实验。结果初步确定以6 Mol/LHNO^(3)为上柱酸度、0.6 mL/min上柱速度和解析体积为12 mL的最佳分离纯化的条件;同时基于ICP-MS对粪样进行质谱测量分析,确定了基于ICP-MS的^(241)Am的检出限为9.79×10^(−4)Bq,测量结果理想,具有可行性。结论本文建立的方法在一定程度上弥补了对粪样中^(241)Am测量方法研究的空缺,对内照射监测和分析人员保护有实际意义。
Objective To preliminarily study and establish a method for measurement of the transuranic nuclide^(241)Am in fecal samples,and to provide technical support for internal radiation monitoring of staff.Methods Fecal samples were collected with a self-made stool sampler and treated with a self-made carbonization and ashing furnace.DGA resin was used to separate and purify^(241)Am from fecal samples.With^(243)Am as the tracer,the orthogonal method was used for condition optimization.Results The optimum conditions for separation and purification were:the acidity of HNO^(3)added into the column,6 mol/L;column flow rate,0.6 mL/min;and the volume of analytical solution,12 mL.The method based on inductively coupled plasma mass spectrometry showed a detection limit of 9.79×10^(−4)Bq for^(241)Am in fecal samples,which was satisfactory and feasible.Conclusion This method fills the vacancy of^(241)Am measurement in fecal samples to some extent,which is of practical significance for internal radiation monitoring and protection for analysts.
作者
宋伟娜
尹云云
李爱云
汪传高
骆志平
庞洪超
SONG Weina;YIN Yunyun;LI Aiyun;WANG Chuangao;LUO Zhiping;PANG Hongchao(China Institute of Atomic Energy,Beijing 102413 China)
出处
《中国辐射卫生》
2022年第5期542-547,共6页
Chinese Journal of Radiological Health
