小型高分辨电子轰击离子源反射式飞行时间质谱仪的研制

引用本文: 何坚, 黄如俊, 李刚, 唐紫超, 林水潮. 小型高分辨电子轰击离子源反射式飞行时间质谱仪的研制[J]. 分析化学, 2012, 40(10): 1616-1621. doi: 10.3724/SP.J.1096.2012.20403 shu

Citation: HE Jian, HUANG Ru-Jun, LI Gang, Tang Zi-Chao, LIN Shui-Chao. Development of a Miniature High Resolution Electron Impact Ion Source Time-of-Flight Mass Spectrometer[J]. Chinese Journal of Analytical Chemistry, 2012, 40(10): 1616-1621. doi: 10.3724/SP.J.1096.2012.20403 shu

小型高分辨电子轰击离子源反射式飞行时间质谱仪的研制

何坚 ^{1,
,} ,
黄如俊 ^1, ,
李刚 ^2, ,
唐紫超 ^2, ,
林水潮 ^3,

通讯作者: 何坚

基金项目:
本文系中央高校科研业务费(No.2010121042)资助项目 (No.2010121042)

摘要: 常用的气体分析质谱仪使用四极杆质谱作为分析器,分辨率一般低于300,无法解决同质量数离子带来的干扰问题。本实验自行研制了一种小型高分辨气体分析质谱仪,它采用电子轰击离子源反射式飞行时间质量分析器。仪器腔体总长45 cm,在m/z 28的位置,质量分辨率达到3000(Full width at half maximum,FWHM),实现了CO和N₂的半峰谷分离;在m/z 69的位置,仪器分辨率达到5000(FWHM)。在直接大气压进样条件下,可以检测到空气中¹³⁶Xe(含量7.8 μg/m³)和⁸⁰Kr (含量2.8 μg/m³)。使用ADC采集时,仪器的动态范围为10⁶。该仪器将作为高端气体质谱仪,应用于过程监测在线分析、环境有机挥发物研究、热分析质谱及催化反应监测等领域。

关键词:

English

Development of a Miniature High Resolution Electron Impact Ion Source Time-of-Flight Mass Spectrometer

1.
¹ The Institute of Physics and Mechanical & Electrical Engineering, The laboratory of Analysis Instrument, Xiamen University, Xiamen 361005, China;

Corresponding author: 何坚

Received Date: 17 April 2012
Fund Project:
本文系中央高校科研业务费(No.2010121042)资助项目

Abstract: Since gas analysis mass spectrometers usually use quadrupole as the mass analyzer, the resolution is typically less than 300, and the same mass ions interference problem cannot be solved. This study developed a high resolution gas analysis mass spectrometer. Electron impact ion source reflection time-of-flight mass analyzer has been designed and tested. The length of vacuum chamber is only 45 cm. Mass resolution of 3,000 (Full width at half maximum, FWHM) has been achieved at m/z 28, as a result, CO and N₂ can be separated at the half peak height. The best resolution of instrument can reach 5000 (FWHM) at m/z 69. At the condition of direct ambient air sampling, ¹³⁶Xe (7.8 μg/m³) and ⁸⁰Kr (2.8 μg/m³) can be detected. The dynamic range is up to 106 with fast ADC acquiring system. This instrument can be used as a high-end gas mass spectrometer and applied to on-line gas analysis for process monitoring, environmental organic volatile compounds research, thermal analysis mass spectrometry and catalytic reaction monitoring.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

小型高分辨电子轰击离子源反射式飞行时间质谱仪的研制

通讯作者: 何坚

English

Development of a Miniature High Resolution Electron Impact Ion Source Time-of-Flight Mass Spectrometer

Corresponding author: 何坚

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

小型高分辨电子轰击离子源反射式飞行时间质谱仪的研制

通讯作者: 何坚

English

Development of a Miniature High Resolution Electron Impact Ion Source Time-of-Flight Mass Spectrometer

Corresponding author: 何坚

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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