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Analyst


Title:Field induced fragmentation spectra from reactive stage-tandem differential mobility spectrometry
Author(s):Fowler PE; Pilgrim JZ; Lee G; Eiceman GA;
Address:"Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA.. geiceman@nmsu.edu"
Journal Title:Analyst
Year:2020
Volume:20200619
Issue:15
Page Number:5314 - 5324
DOI: 10.1039/d0an00665c
ISSN/ISBN:1364-5528 (Electronic) 0003-2654 (Linking)
Abstract:"A planar tandem differential mobility spectrometer was integrated with a middle reactive stage to fragment ions which were mobility selected in a first analyzer stage using characteristic compensation and separation fields. Fragmentation occurred in air at ambient pressure of 660 Torr (8.8 kPa) with electric fields of 10 to 35 kV cm(-1) (E/N of 52 to 180 Td) between two 1 mm wide metal strips, located on each analyzer plate between the first and second mobility stages. Field induced fragmentation (FIF) spectra were produced by characterizing, in a last stage, the mobilities of fragment ions from protonated monomers of 43 oxygen-containing volatile organic compounds from five chemical classes. The extent of fragmentation was proportional to E/N with alcohols, aldehydes, and ethers undergoing multiples steps of fragmentation; acetates fragmented only to a single ion, protonated acetic acid. In contrast, fragmentation of ketones occurred only for methyl i-butyl ketone and 2-hexanone. Fragment ion identities were supported by mass-analysis and known fragmentation routes and suggested that field induced fragmentation at ambient pressure can introduce structural information into FIF spectra, establishing a foundation for chemical identification using mobility methods"
Keywords:
Notes:"PubMed-not-MEDLINEFowler, P E Pilgrim, J Z Lee, G Eiceman, G A eng England 2020/06/20 Analyst. 2020 Aug 7; 145(15):5314-5324. doi: 10.1039/d0an00665c. Epub 2020 Jun 19"

 
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