| Start Date: | 11/13/2014 | Start Time: | 4:30 PM |
| End Date: | 11/13/2014 | End Time: | 5:30 PM |
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Event Description
Andrew S. Wozniak, PhD, research assistant professor, Old Dominion University
"Ultrahigh resolution mass spectrometry studies of organic aerosol molecular composition"
Natural and anthropogenic atmospheric aerosols are of vital importance globally for their impacts on human health and the environment due to the reduction of air quality, delivery of nutrients, pollutants, and organic matter to ecosystems, and impacts on radiative budgets via the direct and indirect effects on climate. Organic matter can comprise up to 90% of aerosol composition, and its molecular characteristics play a major role in determining these environmental impacts. In spite of this presumed role, the links between aerosol source, molecular characteristics, and environmental impacts are not well established, in part due to our inability to fully characterize aerosol OM. The extremely high mass resolution (>400,000) and mass accuracy (<1 ppm) of electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FTICR MS) allow for accurate molecular formula assignment for thousands of organic matter peaks present in a given mass spectrum. Recently, we have applied ESI FTICR MS in conjunction with complementary techniques (proton NMR, excitation emission spectroscopy, isotopic analysis) to obtain a detailed characterization of aerosol OM components in several environments. These efforts will be discussed in the context of understanding the relationships between aerosol OM source, molecular characteristics, and role in the environment. |
Contact Information:
Name: Prof. Frank Ji
Phone: 215.895.2562
Email: hj56@drexel.edu |
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Location:
Disque Hall, Room 109, 32 South 32nd Street, Philadelphia, PA 19135 |
Audience:
AlumniCurrent StudentsFacultyPublicGraduate Students |
Special Features:
Free Food |
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