Publikationstyp: Konferenz: Paper
Art der Begutachtung: Peer review (Publikation)
Titel: Absolute quantification of headspace volatiles by PTR-MS
Autor/-in: Pollien, Philippe
Lindinger, Christian
Ali, Santo
Yeretzian, Chahan
Tagungsband: Contributions to the 1st International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications
Seiten: 153
Seiten bis: 156
Angaben zur Konferenz: 1st International Conference on Proton Transfer Reaction Mass Spectrometry and Its Applications, Innsbruck, 18-23 January 2003
Erscheinungsdatum: 2003
Verlag / Hrsg. Institution: Innsbruck University Press
Verlag / Hrsg. Institution: Innsbruck
Sprache: Englisch
Schlagwörter: Headspace; Flavor; PTR-MS
Fachgebiet (DDC): 540: Chemie
Zusammenfassung: One of the outstanding properties of PTR-fMlS is that it allows for a direct and absolute quantification of volatile organic compounds in the gas-phase. Here we examine this on a model sample of known concentration. The head space of an ethylbutyrate solution is stripped for 14 hours with a flow of 500 sccm/min, until the solution is completely depleted from ethylbutyrate. The measured PTR-MS count-rate is transformed into g/min of released ethylbutyrate. The cumulated amount turns out to be within a few percent of the initial 1000 microgram present in the solution. We then apply the method to in-mouth aroma release of ethylbutyrate to quantity breath-by-breath the quantity exhaled through the nose. Currently several experimental parameters that are not fully taken into consideration may affect a direct quantification (e.g transmission function of MS, humidity of sample gas). Work is underway to resolve these issues.
Volltext Version: Publizierte Version
Lizenz (gemäss Verlagsvertrag): Lizenz gemäss Verlagsvertrag
Departement: Life Sciences und Facility Management
Organisationseinheit: Institut für Chemie und Biotechnologie (ICBT)
Enthalten in den Sammlungen:Publikationen Life Sciences und Facility Management

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