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dc.contributor.authorLindinger, Christian-
dc.contributor.authorPollien, Philippe-
dc.contributor.authorAli, Santo-
dc.contributor.authorYeretzian, Chahan-
dc.contributor.authorBlank, Imre-
dc.contributor.authorTilmann, Märk-
dc.date.accessioned2018-04-23T09:21:13Z-
dc.date.available2018-04-23T09:21:13Z-
dc.date.issued2005-05-26-
dc.identifier.issn0003-2700de_CH
dc.identifier.issn1520-6882de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/5468-
dc.description.abstractInterest in on-line measurements of volatile organic compounds (VOCs) is increasing, as sensitive, compact, and affordable direct inlet mass spectrometers are becoming available. Proton-transfer reaction mass spectrometry (PTR-MS) distinguishes itself by its high sensitivity (low ppt range), high time resolution (200 ms), little ionization-induced fragmentation, and ionization efficiency independent of the compound to be analyzed. Yet, PTR-MS has a shortcoming. It is a one-dimensional technique that characterizes compounds only via their mass, which is not sufficient for positive identification. Here, we introduce a technical and analytical extension of PTR-MS, which removes this shortcoming, while preserving its salient and unique features. Combining separation of VOCs by gas chromatography (GC) with simultaneous and parallel detection of the GC effluent by PTR-MS and electron impact MS, an unambiguous interpretation of complex PTR-MS spectra becomes feasible. This novel development is discussed on the basis of characteristic performance parameters, such as resolution, linear range, and detection limit. The recently developed drift tube with a reduced reaction volume is crucial to exploit the full potential of the setup. We illustrate the performance of the novel setup by analyzing a complex food system.de_CH
dc.language.isoende_CH
dc.publisherAmerican Chemical Societyde_CH
dc.relation.ispartofAnalytical Chemistryde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectPTR-MSde_CH
dc.subject.ddc540: Chemiede_CH
dc.titleUnambiguous identification of volatile organic compounds by proton-transfer-reaction mass-spectrometry (PTR-MS) coupled with GC-MSde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Chemie und Biotechnologie (ICBT)de_CH
zhaw.publisher.placeColumbusde_CH
dc.identifier.doi10.1021/ac0501240de_CH
zhaw.funding.euNode_CH
zhaw.issue13de_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end4124de_CH
zhaw.pages.start4117de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume77de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
Appears in Collections:Publikationen Life Sciences und Facility Management

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