大气采样辉光放电质谱仪的设计与应用  

Design and Application of Atmospheric Sampling Glow Discharge Ionization Mass Spectrometer

作　　者：江游[1] 戴新华[1] 黄泽建[1] 熊行创[1] 方向[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《分析化学》2012年第4期651-654,共4页Chinese Journal of Analytical Chemistry

基　　金：国家科技支撑计划(Nos.2009BAK59B03;2009BAK58B03);十二五仪器专项(No.2011yq090005)资助

摘　　要：针对某些弱极性类物质难以通过大气压离子源直接电离的问题,提出基于大气采样辉光放电电离方式实现弱极性物质在大气压下直接进样、电离和质谱分析的方法。通过在大气压接口-四极质谱仪的第一级真空中的离子透镜上施加交流高压产生放电,简化了辉光放电离子源的设计,能直接离子化大气压接口吸入的物质,离子在离子透镜的传输下进入四极杆质量分析器实现质谱分析。实验表明,本方法能电离电喷雾电离离子源和大气压化学电离离子源未能电离的弱极性物质——艾试剂,并且负离子工作模式比正离子工作模式的信号至少强40倍。Considering the problem that atmospheric ionization cannot ionize some low polarity materials,the method using atmospheric sampling glow discharge to ionize those was proposed.Designed A simple method was designed to discharge in which an alternating current high voltage power was applied to the tube lens in the first stage vacuum of the homebuilt atmospheric pressure interface-single quadrupole mass spectrometer.The low polarity materials was drifted in the discharging region and ionized,and detected by the quadrupole mass analyzer.The experiment showed that the method can be used to detect Aldrin（organochlorine pesticide） that cannot be ionized by electrospray and atmospheric chemical ionization,and the intensity of ions in negative ion detection mode was 40 times stronger than that in positive ion dection mode.

关 键 词：大气采样 辉光放电 四极质谱 艾试剂 弱极性物质 

分 类 号：X831[环境科学与工程—环境工程] O657.63[理学—分析化学]