Publication type: Conference paper
Type of review: Peer review (publication)
Title: Absolute quantification of headspace volatiles by PTR-MS
Authors: Pollien, Philippe
Lindinger, Christian
Ali, Santo
Yeretzian, Chahan
Proceedings: Contributions to the 1st International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications
Pages: 153
Pages to: 156
Conference details: 1st International Conference on Proton Transfer Reaction Mass Spectrometry and Its Applications, Innsbruck, 18-23 January 2003
Issue Date: 2003
Publisher / Ed. Institution: Innsbruck University Press
Publisher / Ed. Institution: Innsbruck
Language: English
Subjects: Headspace; Flavor; PTR-MS
Subject (DDC): 540: Chemistry
Abstract: 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.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Appears in collections:Publikationen Life Sciences und Facility Management

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