Molecular Chemistry of Secondary Organic Aerosol Formed in Photochemical Aging of Primary Anthropogenic Emissions
EMSL Project ID
39957
Abstract
We propose to examine molecular level processes taking place in anthropogenic secondary organic aerosols (SOA) using recently developed tools of high resolution mass spectrometry. The proposed project will address, but is not limited to the following questions. (1) What is the molecular composition of water soluble and insoluble organic compounds in SOA produced by photochemical oxidation of primary vehicular emissions in laboratory experiments? (2) What are the unique molecular components of SOA that can be indicative of its formation from semi-volatile vehicular emissions? (3) What are the key differences between molecular composition of particles with short and long photochemical ages? (4)What are the light absorbing properties of SOA? What are the molecular structures of light absorbers, e.g., brown carbon in SOA samples with significant absorption coefficients for UV and visible light? How does brown carbon evolve as a result of atmospheric aging? (5) What are the similarities and differences between molecular composition of laboratory generated aerosols and fine particles collected in urban areas, such as Los Angeles?
Project Details
Project type
Large-Scale EMSL Research
Start Date
2010-10-01
End Date
2013-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
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Nguyen TB, A Laskin, J Laskin, and S Nizkorodov. 2013. "Brown carbon formation from ketoaldehydes of biogenic monoterpenes." Faraday Discussions 165:473-494. doi:10.1039/c3fd00036b.
Excitation–Emission Spectra and Fluorescence Quantum Yields for Fresh and Aged Biogenic Secondary Organic Aerosols
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Laskin J, PA Eckert, PJ Roach, BS Heath, SA Nizkorodov, and A Laskin. 2012. "Chemical Analysis of Complex Organic Mixtures Using Reactive Nanospray Desorption Electrospray Ionization Mass Spectrometry." Analytical Chemistry 84(16):7179-7187. doi:10.1021/ac301533z
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Nitrogen-Containing Organic Compounds and Oligomers in Secondary Organic Aerosol Formed by Photooxidation of Isoprene
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Molecular chemistry of organic aerosols through the application of high resolution mass spectrometry
3. S. A. Nizkorodov, J. Laskin, A. Laskin ?Molecular Chemistry of Organic Aerosols Through Applications of the High Resolution Mass Spectrometry? Phys. Chem. Chem. Phys., 13, 3612?3629, (2011). doi:10.1039/C0CP02032J (INVITED PERSPECTIVE ARTICLE)
High-Resolution Electrospray Ionization Mass Spectrometry Analysis of Water-Soluble Organic Aerosols Collected with a Particle into Liquid Sampler
Bateman AP, S Nizkorodov, J Laskin, and A Laskin. 2010. "High-Resolution Electrospray Ionization Mass Spectrometry Analysis of Water- Soluble Organic Aerosols Collected with a Particle into Liquid Sampler ." Analytical Chemistry 82(19):8010-8016. doi:10.1021/ac1014386