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NRMRL-RTP-P- 620 Hays**, M.D., Geron*, C.D., Linna**, K.J., Smith*, N.D., and Schauer, J.J. Speciation of Gas-Phase and Fine Particle Emissions from Burning of Foliar Fuels. Submitted to: Environmental Science & Technology EPA/600/J-02/234, http://pubs.acs.org/journals/esthag/. 07/19/2001 Particle size distributions (10-1000 nm aerodynamic diameter), physical and chemical properties of fine particle matter (PM2.5) with aerodynamic diameter <2.5 micrometers, and gas-phase emissions from controlled open burning of assorted taxa were measured. Chemical speciation of organic compounds, elements, and water-soluble ions in the PM2.5 and gas-phase emissions was achieved with gas chromatography/mass spectrometry (GC/MS), wavelength dispersive X-ray fluorescence (XRF) spectroscopy, ion chromatography (IC) techniques, and EPA Methods TO- 15 and TO- 11A. Data show unimodal PM2.5 distributions, indicative of an accumulation mode (xbar = 0.3 micrometers). Smoldering relative to flaming combustion is linked to smaller particle number and size distribution median. Emission factors for greater than 100 individual organic compounds in the primarily carbonaceous PM2.5 are expressed as milligrams of pollutant per kilogram of biofuel burned and classify n-alkane (30-278 mg/kg), polycyclic aromatic hydrocarbon (3-68 mg/kg), n-alkanoic acid (310-830 mg/kg), n-alkanedioic acid (7-47 mg/kg), n-alkenoic acid (53-130 mg/kg), resin acid (50-2760 mg/kg), triterpenoid (31-127 mg/kg), and phytosterol (20-159 mg/kg) compounds. Identified compounds on average account for 17.8 +/- 2.8% of PM2.5 mass.

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