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题名: Magnetic Field Enhanced Photoelectron Ionization Source Portable TOF-MS and Its Application in Analysis of Volatile Reduced Sulfur Compounds
作者: Li Jin-Xu1;  Hou Ke-Yong2;  Zhao Wu-Duo2;  Chen Wen-Dong2, 3;  Jiang Ji-Chun2, 3;  Liu Wei2, 3;  Li Qing-Yun1;  Tian Di1;  Li Hai-Yang1
关键词: Volatile reduced sulfur compounds ;  Magnetic field enhanced photoelectron ionization ;  Portable time-of-flight mass spectrometer ;  Online monitoring
刊名: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
发表日期: 2015-03-01
卷: 43, 期:3, 页:444-450
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: Reduced sulfur compounds (RSCs) are one of the main pollutant species in the atmosphere, so it is of great significance to develop a rapid and on. line approaches for their detection. In this study, a portable time. of. flight mass spectrometer (TOF-MS) with magnetic field enhanced photoelectron ionization source was designed to detect RSCs. The photoelectron ionization source was induced from vacuum ultraviolet photons which generated from vacuum ultraviolet (VUV) lamp with energy of 10. 6 eV. The energy of photoelectrons was controlled by adjusting the extraction voltage to produce the photoelectron ionization, and an annular magnet was used in the ionization region to improve the ionization efficiency of photoelectrons. From the simulation result by SIMION software, it was found that the introduction of magnet field made the motion trajectroies of electrons in the helical motion increase and the convergence of electron at the ionization source was achieved. Experimental results showed that after introducing the magnet filed, the sensitivity of H2S, SO2 and CS2 was improved by a factor of 5. 3, 9. 4 and 6. 9, respectively. With a detection time of 50 s, the limits of detection for H2S, SO2 and CS2 were 0. 14, 0. 52 and 0. 31 mg/m(3)(S/N = 3), respectively. It could be concluded that the portable TOF. MS with magnetic field enhanced photoelectron ionization source has great potential to be applied for on. line monitoring of volatile sulfides at the emission source.
关键词[WOS]: SINGLE-PHOTON IONIZATION ;  ELECTRON-IMPACT IONIZATION ;  FLIGHT MASS-SPECTROMETRY ;  VACUUM-ULTRAVIOLET LAMP ;  SYSTEM ;  DIOXIDE
语种: 英语
WOS记录号: WOS:000354901600017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146251
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Jilin Univ, Coll Instrumentat & Elect Engn, Changchun 130023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Li Jin-Xu,Hou Ke-Yong,Zhao Wu-Duo,et al. Magnetic Field Enhanced Photoelectron Ionization Source Portable TOF-MS and Its Application in Analysis of Volatile Reduced Sulfur Compounds[J]. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY,2015,43(3):444-450.
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