双电离源(辉光放电/激光溅射电离)四极杆质谱仪的研制  

Development of Dual-Source(Glow Discharge/Laser Ablation & Ionization) Quadrupole Mass Spectrometer

作　　者：李灵锋[1] 李卫峰[1] 王小华[1] 杭纬[1] 黄本立[1] 

机构地区：[1]厦门大学化学化工学院分析科学重点实验室,厦门361005

出　　处：《分析化学》2012年第7期983-988,共6页Chinese Journal of Analytical Chemistry

基　　金：国家基础科学人才培养基金项目(No.J1030415);北京吉天仪器有限公司资助

摘　　要：本研究将辉光电离源与激光溅射电离源巧妙地结合在同一台仪器中,使固体样品在离子源腔体中既能辉光电离,也能激光电离;并且使用同一质量分析器,两种离子源的结果可以相互比对,进而得到更为准确的分析结果。此仪器主要由真空系统、离子源、离子传输系统、四极杆质量分析器及检测与数据采集系统等组成。实验中分别用两种离子源测试了标准样品SRM1262b,并获得了半定量结果。结果表明,仪器具有定性能力强,分析速度快,检测灵敏度高等优点,对固体样品元素分析的检出限可达μg/g量级。实验表明,激光溅射电离质谱的性能优于辉光放电质谱。A dual-source mass spectrometer was constructed by combining glow discharge device and laser ablation ionization source with one mass analyzer, which can remarkably reduce the equipment cost. The solid samples can be directly analyzed by the glow discharge or laser ablation ionization in one apparatus. This dual-source （glow discharge/laser ablation ionization） quadrupole mass spectrometer consisted of vacuum system, ionization source, quadrupole mass analyzer, and data acquisition system. A standard SRM1262b was analyzed by two ionization mode separately and a semiquantitative result was acquired. The result shows that the direct measurements of solid by the spectrometer can be performed with rapid qualitative analysis, high sample throughput, and low limit of detection （LOD, p.g/g level）. LAI mode performed a better result than GD mode.

关 键 词：激光电离 辉光放电 四极杆质谱 固体样品直接分析 

分 类 号：TH843[机械工程—仪器科学与技术]