Vacuum Ultraviolet Lamp Based Magnetic Field Enhanced Photoelectron Ionization and Single Photon Ionization Source for Online Time-of-Flight Mass Spectrometry

	Vacuum Ultraviolet Lamp Based Magnetic Field Enhanced Photoelectron Ionization and Single Photon Ionization Source for Online Time-of-Flight Mass Spectrometry
	Wu, Qinghao 1,2; Fua, Lei 1,2; Hou, Keyong 1; Cui, Huapeng 1,2; Chen, Wendong 1,2; Chen, Ping 1,2; Wang, Weiguo 1; Li, Jinghua 1; Li, Haiyang 1
刊名	analytical chemistry
	2011-12-01
卷号	83 期号:23 页码:8992-8998
ISSN号	1520-6882
通讯作者	李海洋
产权排序	1,1
中文摘要	vacuum ultraviolet lamp based magnetic field enhanced photoelectron ionization and single photon ionization source for online time-of-flight mass spectrometry
英文摘要	a magnetic field enhanced photoelectron ionization (mepei) source combined with single photon ionization (spi) was developed for an orthogonal acceleration time-of-flight mass spectrometer (oatofms). a commercial radio frequency (rf) powered vacuum ultraviolet (vuv) lamp was used as spi light source, and the photoelectrons generated by photoelectric effect were accelerated to induce electron ionization (ei). the mepei was obtained by applying a magnetic field of about 800 g with a permanent annular magnet. compared to a nonmagnetic field photoelectron ionization source, the signal intensities for so(2), sf(6), o(2), and n(2) in mepei were improved more than 2 orders with the photoelectron energy around 20 ev, while most of the characteristics of soft ionization still remained. simulation with simion showed that the sensitivity enhancement in mepei was ascribed to the increase of the electron moving path and the improvement of the electrons transmission. the limits of detection for so(2) and benzene were 750 and 80 ppbv within a detection time of 4s, respectively. the advantages of the source, including broad range of ionizable compounds, reduced fragments, and good sensitivity with low energy mepei, were demonstrated by monitoring pyrolysis products of polyvinyl chloride (pvc) and the intermediate products in discharging of the sf(6) gas inpurity.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, analytical
研究领域[WOS]	chemistry
关键词[WOS]	electron-impact ionization ; organic-compounds ; laser-desorption ; low-energy ; gas ; decomposition ; surface ; degradation ; radiation ; emission
收录类别	SCI
语种	英语
WOS记录号	WOS:000297481700025
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115807]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Qinghao,Fua, Lei,Hou, Keyong,et al. Vacuum Ultraviolet Lamp Based Magnetic Field Enhanced Photoelectron Ionization and Single Photon Ionization Source for Online Time-of-Flight Mass Spectrometry[J]. analytical chemistry,2011,83(23):8992-8998.
APA	Wu, Qinghao.,Fua, Lei.,Hou, Keyong.,Cui, Huapeng.,Chen, Wendong.,...&Li, Haiyang.(2011).Vacuum Ultraviolet Lamp Based Magnetic Field Enhanced Photoelectron Ionization and Single Photon Ionization Source for Online Time-of-Flight Mass Spectrometry.analytical chemistry,83(23),8992-8998.
MLA	Wu, Qinghao,et al."Vacuum Ultraviolet Lamp Based Magnetic Field Enhanced Photoelectron Ionization and Single Photon Ionization Source for Online Time-of-Flight Mass Spectrometry".analytical chemistry 83.23(2011):8992-8998.