基于高分辨气体稳定同位素质谱仪的甲烷团簇同位素测定  

Determination for methane clumped isotopes by high-resolution gas stable isotope mass spectrometer

作　　者：庞智勇 王欣楚 李思亮 郎赟超 田有荣 鲁丽 PANG Zhiyong;WANG Xinchu;LI Siliang;LANG Yunchao;TIAN Yourong;LU Li(Institute of Surface-Earth System Science,School of Earth System Science,Tianjin University,Tianjin 300072,China;Thermo Fisher Scientific(China)Company Ltd.,Beiiing100013,China)

机构地区：[1]天津大学表层地球系统科学研究院,地球系统科学学院,天津300072 [2]赛默飞世尔科技(中国)有限公司,北京100013

出　　处：《分析试验室》2023年第1期33-37,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(41925002)项目资助。

摘　　要：甲烷团簇同位素中质量数为18的13CH3D和12CH2D22种同位素体具有独特的化学和物理性质,可以为甲烷成因的研究提供重要信息。依托国内高分辨气体稳定同位素质谱仪(HR-IRMS),调节分辨能和修正各种参数,在高分辨模式下优化测试时间及多种参数,建立了甲烷团簇同位素测试方法。基于该方法,连续分析δ13CH3D和δ12CH2D2的测试精度分别达到0.27‰和1.55‰。The13CH3D and12CH2D2isotopes with mass number of 18 in methane clumped isotope have unique chemical and physical properties, which can provide important information for the study of the origin of methane.Relying on the domestic first high resolution gas stable isotope mass spectrometer(HR-IRMS), a relatively mature clusters of methane clumped isotopes test method was established after adjusting resolusion, correcting parameters, optimizing test time, as well as improving signal response. Based on this method, the test accuracy of the δ13CH3D and δ12CH2D2achieved 0.27‰ and 1.55‰, respectively.

关 键 词：高分辨气体稳定同位素质谱仪 甲烷 团簇同位素 精度 

分 类 号：O657.63[理学—分析化学] X142[理学—化学]