ANYL Thomas Rossi  Sunday, April 07, 2013 

135 - Water-soluble organic compounds in ambient aerosol: A study using positive ion mode electrospray ionization Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry

Parichehr Saranjampour1, psaranja@mtu.edu, Vera Samburova2, A. Gannet Hallar2, Douglas Lowenthal2, Barbara Zielinska2, Lynn R. Mazzoleni1,3. (1) Chemistry, Michigan Technological University, Houghton, MI 49931, United States, (2) Division of Atmospheric Science, Desert Research Institute, Reno, NV 89512, United States, (3) Atmospheric Science Program, Michigan Technological University, Houghton, MI 49931, United States

Water-soluble organic compounds of atmospheric aerosol were analyzed using positive electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Ambient aerosol collected at a nonurban high elevation site near Steamboat Springs, CO. Approximately, 2400 molecular formulas were assigned to the positive ions containing carbon, hydrogen, oxygen, nitrogen, and sulfur atoms in the range of m/z 100-800. The double bond equivalents (DBE) range, mean O:C, mean H:C, and oxidation state of carbon were 0 - 18, 0.25 ± 0.15, 1.39 ± 0.29, and -0.89 ± 0.23, respectively. A majority of the CHOS, CHNOS, and CHS formulas were highly unsaturated with mean DBE values of 12, 13, and 10, respectively. A majority of the CHNO and CHO formulas were more saturated with mean DBE values of 5 and 3, respectively. Several CHNO formulas were observed to be common with those of other studies including biomass burning aerosol and aged products of limonene ozonolysis.


Sunday, April 7, 2013 01:00 PM
General Posters (01:00 PM - 05:30 PM)
Location: Morial Convention Center
Room: Hall D

 

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