Heterogeneous anthracene-ozone reaction on size-selected sodium chloride particles

COLL 15

Eric F Gloaguen, EFGloaguen@lbl.gov1, Erin R. Mysak, mysak@email.unc.edu2, Stephen R. Leone, srl@berkeley.edu3, Musahid Ahmed, MAhmed@lbl.gov4, and Kevin R. Wilson4. (1) Chemical Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, (2) Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599-3290, (3) Departments of Chemistry and Physics, University of California at Berkeley / Lawrence Berkeley National Lab, 209 Gilman Hall, Department of Chemistry, Berkeley, CA 94720, (4) Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, 1 Cyclotron Road Mailstop 10-100, Berkeley, CA 94720
The complete characterization of the chemical composition of aerosols is still a difficult goal to achieve, particularly for complex and atmospherically relevant systems such as mixed organic-inorganic particles. In order to characterize the organic fraction of the particles, a Vacuum UltraViolet Aerosol Mass Spectrometer (VUV-AMS) has been developed at the Chemical Dynamics Beamline (Advanced Light Source, Lawrence Berkeley National Laboratory). This was used to characterize the products of the heterogeneous {anthracene + ozone} reaction on size-selected sodium chloride particles in a flow tube system. The recorded fragment free mass spectra allows for the characterization of several products liberated from the particle phase by subsequent particle vaporization. Kinetics of the formation of these products and particle size measurements using a Scanning Mobility Particle Sizer (SMPS) were also simultaneously recorded and suggest an increase of the particle size that correlates with the formation of the products on the particles.
 

Environmental Interfaces
8:30 AM-12:00 PM, Sunday, 10 September 2006 Sir Francis Drake -- Empire Room, Oral

Division of Colloid & Surface Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006