Lubricating Oil Dominates Primary Organic Aerosol Emissions from Motor Vehicles
| Autor: | Robert A. Harley, Christopher R. Ruehl, Kevin R. Wilson, Thomas W. Kirchstetter, Timothy R. Dallmann, Drew R. Gentner, Arthur W. H. Chan, Allen H. Goldstein, G. A. Isaacman, David R. Worton |
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| Rok vydání: | 2014 |
| Předmět: |
Analytical chemistry
Combustion Gas Chromatography-Mass Spectrometry chemistry.chemical_compound Diesel fuel Alkanes Environmental Chemistry Organic chemistry Organic Chemicals Gasoline Cyclopentane Oxygenate Alkyl Lubricants Vehicle Emissions Aerosols chemistry.chemical_classification Air Pollutants Atmosphere Chemistry General Chemistry Carbon Aerosol Motor Vehicles Cycloalkane San Francisco Oils |
| Zdroj: | Environmental Science & Technology. 48:3698-3706 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Motor vehicles are major sources of primary organic aerosol (POA), which is a mixture of a large number of organic compounds that have not been comprehensively characterized. In this work, we apply a recently developed gas chromatography mass spectrometry approach utilizing "soft" vacuum ultraviolet photoionization to achieve unprecedented chemical characterization of motor vehicle POA emissions in a roadway tunnel with a mass closure of >60%. The observed POA was characterized by number of carbon atoms (NC), number of double bond equivalents (NDBE) and degree of molecular branching. Vehicular POA was observed to predominantly contain cycloalkanes with one or more rings and one or more branched alkyl side chains (≥80%) with low abundances of n-alkanes and aromatics ( |
| Databáze: | OpenAIRE |
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