Characterization of Aerosol Organics by LC-MSn
EMSL Project ID
30190
Abstract
In summer, 2009, a comprehensive field study is planned to characterize the effect of organics on the water activity of atmospheric particles under sub- and supersaturated conditions at the Desert Research Institutes Storm Peak Laboratory (SPL), a mountaintop site in northwestern Colorado (3210 AMSL). This EMSL Science Theme Proposal seeks to support a collaboration with Drs. Alexander Laskin and Julia Laskin focused on chemical characterization of high molecular weight constituents of water-soluble organic aerosols. We propose to collect integrated aerosol samples at SPL and extract the WSOC component. Hygroscopic growth factors and CCN activity will be determined in the laboratory from aerosols generated from the isolated WSOC extracts using HTDMA and CCN analysis. Speciation of WSOC will be performed in DRIs using traditional methods suitable for identification of lower molecular weight compounds, while higher molecular weight compounds (i.e., HULIS) in WSOC will be analyzed in EMSL by a high resolution LC-LTQ-Orbitrap mass spectrometer.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2008-10-01
End Date
2009-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members