化学电离技术在大气气溶胶质谱分析中的应用与展望  

Review on chemical ionization technique application in mass spectrometric analysis of atmospheric aerosols

作　　者：张新 李致宇[1,2,3] 蔺悦 韩月梅[1,2] ZHANG Xin;LI Zhiyu;LIN Yue;HAN Yuemei(Key Laboratory of Aerosol Chemistry and Physics,State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China;CAS Center for Excellence in Quaternary Science and Global Change,Xi’an 710061,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,中国科学院气溶胶化学与物理重点实验室,西安710061 [2]中国科学院第四纪科学与全球变化卓越创新中心,西安710061 [3]中国科学院大学,北京100049

出　　处：《地球环境学报》2021年第5期471-482,共12页Journal of Earth Environment

基　　金：中国科学院项目(292020000018);国家自然科学基金项目(42007207)。

摘　　要：化学电离技术在大气气溶胶质谱分析中的应用已较为广泛。本文对化学电离质谱的结构与工作原理进行了简介,重点归纳总结了近年来化学电离质谱技术对大气自由基和痕量气体的测量、在有机气溶胶的外场观测和实验室研究中的应用与进展情况,探讨了目前研究中尚待解决的难点问题,并对化学电离质谱未来的研究工作及发展趋势进行了展望。Background,aim,and scope Atmospheric aerosols have great impacts on regional air quality,global climate,and human health.Characterization of aerosols is essential to accurately evaluate their impacts.Prior studies on atmospheric aerosols with the application of chemical ionization mass spectrometry (CIMS) are reviewed herein.Materials and methods This study introduces the fundamental principles of CIMS and their advantages.The recent developments in the characterization of atmospheric free radicals,trace gases,and organic aerosols are overviewed.Results Compared to other methods,chemical ionization is a soft ionization technique with the advantages of high selectivity and sensitivity,low detection limit,and less molecular fragmentation.It also can be applied under atmospheric pressure and is easy to qualitatively and quantitatively characterize the analyte molecules.Discussion High selectivity measurement of CIMS can be achieved by using different reagent ions to induce the ionization of analytes.It can be used for accurately analyzing trace gases and free radicals in the atmosphere,and also for determining volatile organic compounds,secondary organic aerosol,and aerosols with unknown complex components.Conclusions CIMS can obtain more compositional and molecular information compared to traditional techniques.It provides advanced knowledge on the chemical properties of atmospheric aerosols,in particular for secondary organic aerosols and their precursors.Recommendations and perspectives Challengessuch as the ion generator source and the measurement accuracy of CIMS should be further improved and optimized.Characterizing the chemical properties of secondary organic aerosols associated to their formation and evolution processes would be an important topic for future studies using CIMS.

关 键 词：化学电离 试剂离子 质谱分析 大气气溶胶 

分 类 号：X513[环境科学与工程—环境工程] X831