Use of proton-transfer-reaction mass spectrometry to characterize volatile organic compound sources at the La Porte super site during the Texas Air Quality Study 2000

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dc.acquisition-srcDownloaded from-Web of Scienceen_US
dc.call-noen_US
dc.contract-noen_US
dc.contributor.authorKarl Ten_US
dc.contributor.authorJobson Ten_US
dc.contributor.authorKuster WCen_US
dc.contributor.authorWilliams Een_US
dc.contributor.authorStutz Jen_US
dc.contributor.authorShetter Ren_US
dc.contributor.authorHall SRen_US
dc.contributor.authorGoldan Pen_US
dc.contributor.authorFehsenfeld Fen_US
dc.contributor.authorLindinger Wen_US
dc.contributor.otherJournal of Geophysical Research-Atmospheresen_US
dc.date.accessioned2010-02-15T17:18:20Z
dc.date.available2010-02-15T17:18:20Z
dc.date.issued2003 Aug 26en_US
dc.degreeen_US
dc.description-en_US
dc.description-otheren_US
dc.description.abstractProton-transfer-reaction mass spectrometry (PTR-MS) was deployed for continuous real-time monitoring of volatile organic compounds (VOCs) at a site near the Houston Ship Channel during the Texas Air Quality Study 2000. Overall, 28 ions dominated the PTR-MS mass spectra and were assigned as anthropogenic aromatics ( e. g., benzene, toluene, xylenes) and hydrocarbons ( propene, isoprene), oxygenated compounds ( e. g., formaldehyde, acetaldehyde, acetone, methanol, C-7 carbonyls), and three nitrogen-containing compounds (e.g., HCN, acetonitrile and acrylonitrile). Biogenic VOCs were minor components at this site. Propene was the most abundant lightweight hydrocarbon detected by this technique with concentrations up to 100+ nmol mol(-1), and was highly correlated with its oxidation products, formaldehyde (up to similar to40 nmol mol(-1)) and acetaldehyde (up to similar to80 nmol/mol), with typical ratios close to 1 in propene-dominated plumes. In the case of aromatic species the high time resolution of the obtained data set helped in identifying different anthropogenic sources (e.g., industrial from urban emissions) and testing current emission inventories. A comparison with results from complimentary techniques (gas chromatography, differential optical absorption spectroscopy) was used to assess the selectivity of this on-line technique in a complex urban and industrial VOC matrix and give an interpretation of mass scans obtained by 'soft' chemical ionization using proton-transfer via H3O+. The method was especially valuable in monitoring rapidly changing VOC plumes which passed over the site, and when coupled with meteorological data it was possible to identify likely sourcesen_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23615
dc.latitudeen_US
dc.locationen_US
dc.longitudeen_US
dc.notesTimes Cited: 3ArticleEnglishKarl, TNatl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USACited References Count: 33720FR2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USAWASHINGTONen_US
dc.placeen_US
dc.publisheren_US
dc.relation.ispartofseries51267.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectACETONEen_US
dc.subjectAIRen_US
dc.subjectair qualityen_US
dc.subjectBOUNDARY-LAYERen_US
dc.subjectCHEMISTRYen_US
dc.subjectCHROMATOGRAPHYen_US
dc.subjectCOMPONENTSen_US
dc.subjectEMISSIONSen_US
dc.subjectFLORIDAen_US
dc.subjectFORMALDEHYDEen_US
dc.subjectHoustonen_US
dc.subjectHouston Ship Channelen_US
dc.subjectHYDROCARBONen_US
dc.subjectHYDROCARBONSen_US
dc.subjectISOPRENEen_US
dc.subjectmonitoringen_US
dc.subjectORGANIC-COMPOUNDSen_US
dc.subjectOXIDATIONen_US
dc.subjectozoneen_US
dc.subjectPLUMEen_US
dc.subjectPTR-MSen_US
dc.subjectTEXASen_US
dc.subjectTUNNELen_US
dc.subjectURBANen_US
dc.subjectUSAen_US
dc.subjectVOCen_US
dc.titleUse of proton-transfer-reaction mass spectrometry to characterize volatile organic compound sources at the La Porte super site during the Texas Air Quality Study 2000en_US
dc.typeJournalen_US
dc.universityen_US
dc.vol-issue108(D16)en_US

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