CHED 1128 |
| A number of studies have implicated quinones in the toxicological effects of particulate matter (PM), and levels of these compounds are high in Central California. In this work, levels of about seventy organic compounds (including quinones, polyaromatic hydrocarbons (PAHs), alkanes and carboxylic acids) were quantified in Fresno CA. Samples were collected at two sites using both Teflon filters and a Lundgren impactor during 2006 and 2007. Organics were then extracted and analyzed by gas chromatography-mass spectrometry. Mass loadings of quinones were consistent with previous measurements in the region, with up to 70 % of the quinones found in fine PM. The measurements are consistent with traffic and wood burning as the predominant sources of these compounds. The data suggest that the quinones are directly emitted into the air and that atmospheric oxidation of PAHs does not contribute significantly to the mass loadings of these compounds in the region. |
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Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |