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题名: Field Switching Combined with Bradbury-Nielsen Gate for Ion Mobility Spectrometry
作者: Chen, Chuang1;  Tabrizchi, Mahmoud2;  Wang, Weiguo1;  Li, Haiyang1
刊名: ANALYTICAL CHEMISTRY
发表日期: 2015-08-04
DOI: 10.1021/acs.analchem.5b01737
卷: 87, 期:15, 页:7925-7930
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: Bradbury-Nielsen gate (BNG) is commonly used in ion mobility spectrometers. It, however, transmits only a small fraction of the ions into the drift region, typically 1%. In contrast, all ions in the ionization chamber could be efficiently compressed into the drift region by the field switching gate (FSG). We report in this paper on the simultaneous use of BNG and field switching (FS) to enhance ion utilization of the BNG. In this technique, the FS collects the ions existing in the region between the FS electrode and the BNG and drives them quickly, going through the BNG in the period of gate opening. The BNG acts as the retarding field in the reported FSG to stop ions from diffusing into the drift region in the period of gate closing. Using this technique, an increase of at least 10-fold in the ion peak height without any loss of resolution is achieved for acetone compared with the BNG-only approach at a gate pulse width of 150 mu s, and an even larger improvement factor of 21 is achieved for heavier DMMP dimer ions. This technique can be adapted to the current BNG-based ion mobility instruments to significantly enhance their sensitivity without any modification of the drift tube hardware.
关键词[WOS]: RESOLUTION ;  DESIGN
语种: 英语
WOS记录号: WOS:000359277900060
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146458
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.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China
2.Isfahan Univ Technol, Dept Chem, Esfahan 8415683111, Iran

Recommended Citation:
Chen, Chuang,Tabrizchi, Mahmoud,Wang, Weiguo,et al. Field Switching Combined with Bradbury-Nielsen Gate for Ion Mobility Spectrometry[J]. ANALYTICAL CHEMISTRY,2015,87(15):7925-7930.
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