Atmospheric volatile organic compounds (VOCs) samples were collected during typical months for four seasons from July 2018 to April 2019 at an urban site in Wuhan, and measured by chromatography-mass spectrometry/flame ionization detector (GC-MS/FID). The average concentration of total volatile organic compounds (TVOCs) was (29.39±10.05)×10-9, declining in the following order: alkanes, alkenes, aromatics, and halogenated hydrocarbons. The concentration of TVOCs in winter was considerably higher than that in summer. Analyzed by the positive matrix factorization model, the major sources of VOCs in Wuhan were combustion (37.00%), vehicular exhaust (28.58%), solvent usage (13.87%), petrochemical industry (13.36%) and biogenic emission (7.20%). The main VOCs, with higher contribution to ozone formation potential, were ethene, propene, m/p-xylene, propane, isoprene, and so on, mainly from vehicular exhaust, fuel combustion, petrochemical industry and solvent usage.
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