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| Titel |
MS/MS studies on the selective on-line detection of sesquiterpenes using a Flowing Afterglow–Tandem Mass Spectrometer (FA-TMS) |
| VerfasserIn |
J. Rimetz-Planchon, F. Dhooghe, N. Schoon, F. Vanhaecke, C. Amelynck |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 4 ; Nr. 4, no. 4 (2011-04-07), S.669-681 |
| Datensatznummer |
250001927
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| Publikation (Nr.) |
 copernicus.org/amt-4-669-2011.pdf |
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| Zusammenfassung |
| A Flowing Afterglow-Tandem Mass Spectrometer (FA-TMS) was used to
investigate the feasibility of selective on-line detection of a series of
seven sesquiterpenes (SQTs). These SQTs were chemically ionized by either
H3O+ or NO+ reagent ions in the FA, resulting among others in
protonated SQT and SQT molecular ions, respectively. These and other
Chemical Ionization (CI) product ions were subsequently subjected to
dissociation by collisions with Ar atoms in the collision cell of the tandem
mass spectrometer. The fragmentation spectra show similarities with mass
spectra obtained for these compounds with other instruments such as a Proton
Transfer Reaction-Linear Ion Trap (PTR-LIT), a Proton Transfer Reaction-Mass
Spectrometer (PTR-MS), a Triple Quadrupole-Mass Spectrometer (QqQ-MS) and a
Selected Ion Flow Tube-Mass Spectrometer (SIFT-MS). Fragmentation of
protonated SQT is characterized by fragment ions at the same masses but with
different intensities for the individual SQT. Distinction of SQTs is based
on well-chosen intensity ratios and collision energies. The fragmentation
patterns of SQT molecular ions show specific fragment ion tracers at m/z 119,
m/z162, m/z 137 and m/z 131 for α-cedrene, δ-neoclovene, isolongifolene
and α-humulene, respectively. Consequently, chemical ionization of SQT by
NO+, followed by MS/MS of SQT+ seems to open a way for selective
quantification of SQTs in mixtures. |
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