质谱法测量碳同位素丰度在气体扩散法分离乙醇中的应用  

Application of Carbon Isotope Abundance Measurement by Mass Spectrometry in the Separation of Ethanol by Gas Diffusion Method

作　　者：王飞 潘建雄 周明胜[1] 姜东君[1] 李俊杰[1] WANG Fei;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;LI Junjie(Department of Engineering Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《同位素》2022年第1期27-32,共6页Journal of Isotopes

摘　　要：乙醇是扩散分离碳同位素的一种可行的介质,为得到气体扩散法分离乙醇的分离系数,开展元素分析-同位素比质谱法(EA-IRMS)测量乙醇中碳同位素丰度在气体扩散分离实验中的应用研究。通过文献调研,本研究优化了乙醇样品的制备流程,发展了EA-IRMS用于乙醇碳同位素丰度测定的方法,进行了稳定性测试,实现了对乙醇样品碳同位素丰度的测量。基于气体扩散法的分离实验,获取多次分离实验中精料乙醇和贫料乙醇的碳同位素丰度,经公式推导可计算得到乙醇扩散分离碳同位素的基本全分离系数。本研究为未来开展以乙醇为介质扩散分离碳同位素实验提供了分析基础。Ethanol is a feasible medium for diffusion separation of carbon isotopes.In order to obtain the separation coefficient of gas diffusion separation of ethanol,the application of elemental analysis isotope ratio mass spectrometry(EA-IRMS)to measure the carbon isotope abundance in ethanol in gas diffusion separation experiment was studied.Through literature investigation,this study optimized the preparation process of ethanol samples,developed the method of EA-IRMS for the determination of carbon isotope abundance of ethanol,tested the stability,and realized the measurement of carbon isotope abundance of ethanol samples.Based on the separation experiment of gas diffusion method,the carbon isotope abundances of refined ethanol and lean ethanol in multiple separation experiments are obtained.The basic total separation coefficient of carbon isotopes by ethanol diffusion can be calculated by formula derivation.This study provides an analytical basis for the future experiment of diffusion separation of carbon isotopes with ethanol as medium.

关 键 词：元素分析-同位素比质谱法 乙醇 气体扩散法 碳同位素 同位素丰度测定 

分 类 号：TL92[核科学技术—核燃料循环与材料]