Master of Science (MS)
First Committee Member
Brian J. Johnson
Second Committee Member
Spencer M. Steinberg
Number of Pages
Atmospheric aromatic hydrocarbons and dicarboxylic acids were measured simultaneously in this work. A method was developed for aromatic hydrocarbons: collection on Tenax and charcoal, thermal desorption, and gas chromatographic analysis. Another method was verified for diacids: collection on quartz filter, conversion to dibutylesters, and analysis by capillary gas chromatography; Results of aromatic hydrocarbon measurements show a very strong linear relation among all aromatic hydrocarbons, and a significant correlation between aromatic hydrocarbons and CO measured at a nearby location. This result strongly suggests that aromatic hydrocarbons originate from automobiles. After correcting for dilution effects by normalizing hydrocarbon concentrations by CO concentration, the observed decrease in the normalized daytime concentrations indicates that atmospheric aromatic hydrocarbons undergo photochemical destruction during the daytime; Results of diacid measurements show a complex diurnal variation in concentrations. The diacids measured possibly came from either local production and/or emissions, resuspension, or from long-range transport from other areas.
Acids; Air; Ambient; Dicarboxylic; Hydrocarbons; Measurement; Monoaromatic; Simultaneous
Chemistry, Analytic; Organic chemistry; Environmental sciences
University of Nevada, Las Vegas
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Tran, Ngoc Khanh, "Simultaneous measurement of monoaromatic hydrocarbons and dicarboxylic acids in ambient air" (1997). UNLV Retrospective Theses & Dissertations. 3351.