Identification and Atmospheric Reactions of Polar Products of Selected Aromatic Hydrocarbons

摘要

During this experimental program, we have used the facilities and expertise available at the Air Pollution Research Center, University of California, Riverside, to investigate the atmospheric chemistry of selected aromatic hydrocarbons found in California's atmosphere. Experiments were carried out in large volume (5800 to approx. 7500 liter) chambers with analysis of reactants and products by gas chromatography (with flame ionization and mass spectrometric detection) and in situ Fourier transform infrared spectroscopy. The gas chromatographic analyses included the use of Solid Phase MicroExtraction (SPME) fibers coated with derivatizing agent for on-fiber derivatization of carbonyl-containing compounds, with subsequent gas chromatographic (GC) analyses of the carbonyl-containing compounds as their oximes. This technique was especially useful for the identification and quantification of 1,2-dicarbony1s and unsaturated 1,4-dicarbonyls, some of which are not commercially available and most of which and do not elute from gas chromatographic columns without prior derivatization.