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Bradbury-Nielsen-Gate-Grid Structure for Further Enhancing the Resolution of Ion Mobility Spectrometry
Du, Yongzhai1,2; Wang, Weiguo1; Li, Haiyang1
Source PublicationANALYTICAL CHEMISTRY
2012-07-03
DOI10.1021/ac300887g
Volume84Issue:13Pages:5700-5707
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Analytical
WOS Research AreaChemistry
WOS KeywordCHEMICAL WARFARE AGENTS ; PLASMA CHROMATOGRAPHY ; ATMOSPHERIC-PRESSURE ; MASS-SPECTROMETRY ; AMBIENT-PRESSURE ; RESOLVING POWER ; ILLICIT DRUGS ; SPACE-CHARGE ; EXPLOSIVES ; SIMULANTS
AbstractIn our previous work we proposed a three-zone theory for the Bradbury-Nielsen (BN) gate and proved with a grid-BN structure ion mobility drift tube that enhancements of the three-zone features led to higher resolutions and sometimes higher sensitivities. In this work we continued to seek further improvements of the resolution performance by adopting a BN-grid structure in the same drift tube. The postgate grid works both for confinement of the BN gate induced electric field and for isolation of the injection field from the drift field. This makes it possible to obtain better resolutions by further enhancing the compression electric field and lowering the injection field. It was found in the following experiments that reducing the injection field led to higher resolutions yet lower sensitivities. At an injection field of 140 V/cm, the inverse compression coefficient was found to be much larger than that in the grid-BN structure at all gating voltage differences (GVDs). At GVD = 350 V and a gate pulse width of 0.34 ms, the ion mobility spectrometry efficiency R-m/R-c reached as high as 221% in the BN-grid structure, presenting a further increase compared to 182% in the grid-BN structure. Finally, two examples are given to show the separation power improvements with good resolutions.
Language英语
WOS IDWOS:000305871300036
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142997
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
Du, Yongzhai,Wang, Weiguo,Li, Haiyang. Bradbury-Nielsen-Gate-Grid Structure for Further Enhancing the Resolution of Ion Mobility Spectrometry[J]. ANALYTICAL CHEMISTRY,2012,84(13):5700-5707.
APA Du, Yongzhai,Wang, Weiguo,&Li, Haiyang.(2012).Bradbury-Nielsen-Gate-Grid Structure for Further Enhancing the Resolution of Ion Mobility Spectrometry.ANALYTICAL CHEMISTRY,84(13),5700-5707.
MLA Du, Yongzhai,et al."Bradbury-Nielsen-Gate-Grid Structure for Further Enhancing the Resolution of Ion Mobility Spectrometry".ANALYTICAL CHEMISTRY 84.13(2012):5700-5707.
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