April 2015 Meeting Announcement, Delaware Valley Mass Spectrometry Discussion Group
Please note room change to Mendel Hall 115
- Topic: "Unraveling the Complexity of Atmospheric Aerosol: Insights from Ultrahigh Resolution Mass Spectrometry"
- Speaker: Lynn R. Mazzoleni, Michigan Technological University
- Date: Monday, April 13, 2015. 6:00 PM
- Time: Social Hour: 6:00 PM.
Talk: 7:00 PM.
Please RSVP to John Masucci JMasucci@its.jnj.com by Thursday April 9.
- Place: Department of Chemistry, Villanova University (Room 115, Mendel Hall)
- Abstract:Atmospheric aerosol organic matter (AOM) is a complex mixture of thousands of organic compounds, which may have significant influence on the climate-relevant properties of atmospheric aerosols. An improved understanding of the molecular composition of AOM is needed to evaluate the effect of aerosol composition upon aerosol physical properties.
Products of gas, aqueous and particle phase reactions contribute to the aerosol organic mass. Thus, ambient aerosols carry a complex array of AOM components with variable chemical
signatures depending upon its origin and aerosol life-cycle processes. In this work, ultrahighresolution Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) was
used to characterize ambient aerosol AOM collected at the Storm Peak Laboratory (3210 m.a.s.l.) near Steamboat Springs, CO. Thousands of molecular formulas were assigned in the
mass range of m/z 100–800 after negative-ion electrospray ionization. Using multivariate statistical analysis, correlations between the site meteorological conditions and specific
molecular compositions were identified. For example, days with strong UV radiation and high temperature were found to contain large numbers of biogenic SOA molecular formulas.
Similarly, days with high relative humidity and high sulfate concentrations were found to contain many sulfur-containing compounds, suggesting their aqueous phase formation.
- Bio: Dr. Mazzoleni is an Associate Professor of Chemistry at Michigan Tech. Her primary research interest is to identify organic aerosol constituents and link them to atmospheric processes and aerosol properties. Her research group uses advanced mass spectrometry (MS) techniques to identify organic molecules from atmospheric complex mixtures. Her group has participated in a number of ambient and laboratory studies and is complying a large database of molecular observations to unravel the complex nature of ambient aerosol. Dr. Mazzoleni has published over 20 peer-reviewed journal articles and is currently the lead investigator of collaborative research carried out at the Pico Mountain Observatory in the Azores (PT). This work is designed to understand the chemical, physical, and radiative properties of North Atlantic free tropospheric aerosol.
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