摘要
线性离子阱-飞行时间质谱是一种具有分析速度快、分辨率高、灵敏度高的多级串联质谱,而差分真空系统则是线性离子阱-飞行时间质谱研制的基础.该文从差分真空系统的原理着手,通过对差分系统材料、测量元件以及排气系统的选择,设计了线性离子阱-飞行时间质谱差分真空系统-四级差分真空系统.理论计算和测试结果均表明,该系统基本满足了线性离子阱-飞行时间质谱的要求,并实现从工作在大气压下的离子源到真空度10-4Pa分析器的顺利过渡,为线性离子阱-飞行时间质谱的研制提供了可靠保证.
Linear ion trap-time of flight mass spectrometer （LIT-TOFMS） is one of multi-stage tandem mass spectrometry with high detection efficiency, high resolving power and high sensitivity. The differential vacuum system is the foundation of LIT-TOFMS. Based on the principle of differential vacuum system, the choice of materials, vacuum measurement elements and pumping system are introduced. By the calculation, the LIT-TOFMS vacuum systemfour-stage differential vacuum system is successfully designed. Both the theoretical analysis and the experiment results prove that this system could meet the requirements of LIT-TOFMS and realize the pressure transition from atmospheric pressure to 10^-4 Pa, which is a reliable guarantee for the research and development of LIT-TOFMS.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2015年第4期35-40,共6页
Journal of South China Normal University(Natural Science Edition)
基金
国家重大科学仪器设备开发专项(2011YQ170067)
关键词
线性离子阱-飞行时间质谱
差分真空系统
真空
linear ion trap-time of flight mass spectrometer （LIT-TOFMS）
differential vacuum system
vacuum
