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题名: Resolution Enhancement of Ion Mobility Spectrometry by Improving the Three-Zone Properties of the Bradbury-Nielsen Gate
作者: Du, Yongzhai1, 2;  Wang, Weiguo1;  Li, Haiyang1
刊名: ANALYTICAL CHEMISTRY
发表日期: 2012-02-07
DOI: 10.1021/ac203013u
卷: 84, 期:3, 页:1725-1731
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: A simple space compression-dispersion model for ion transport at ambient pressure was mathematically established. On the basis of this model and aided by SIMION simulation, a three-zone theory was proposed to characterize the Bradbury-Nielsen gating electric field features as three zones: the depletion zone, the dispersion zone, and the compression zone. Then, the influences of gating voltage difference increases on the full width at half-maximum of the Cl- peak were investigated in detail to verify the theory. For example, at a gating voltage difference of 350 V and a gate pulse width of 0.34 ms, the ion packets injected were reduced to as low as 60% of their original widths, with the peak height increased from 756 to 808 pA and the resolution from 18 to 33, enhanced by 7% and similar to 80%, respectively. The ion mobility spectrometry (IMS) efficiency ratios, R-m/R-c and R-m/R-p, were also raised above theoretical values and reached about 182% and 175%, respectively. The experimental results were explained using the proposed theory with good consistency. Finally, a compression coefficient was extracted by fitting the experimental data to the applied gate pulse width, presenting a good linearity. All this shows a potential application in improving the performances of ion mobility spectrometry.
关键词[WOS]: CHEMICAL WARFARE AGENTS ;  PLASMA CHROMATOGRAPHY ;  RESOLVING POWER ;  ATMOSPHERIC-PRESSURE ;  MASS-SPECTROMETRY ;  AMBIENT-PRESSURE ;  SPACE-CHARGE ;  DRIFT-TUBE ;  EXPLOSIVES ;  IONIZATION
语种: 英语
WOS记录号: WOS:000299863200075
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138068
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, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Du, Yongzhai,Wang, Weiguo,Li, Haiyang. Resolution Enhancement of Ion Mobility Spectrometry by Improving the Three-Zone Properties of the Bradbury-Nielsen Gate[J]. ANALYTICAL CHEMISTRY,2012,84(3):1725-1731.
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