Analytical Chemistry Seminar: Elizabeth Stone
Jointly sponsored by the Department of Chemistry and Biochemistry, CIRES, and the Environmental Program
Advances in the quantitation of atmospheric organosulfates
by Elizabeth Stone - Assistant Professor, Department of Chemistry, University of Iowa
Organosulfates are significant components of secondary organic aerosols (SOA) formed under acidic conditions. This class of compounds contains a characteristic sulfate ester functional group (R-O-SO3-) and is suggested to be a significant contributor to organic carbon in fine particles in the atmosphere. However, the quantification of individual organosulfates molecules has proven challenging due to the lack of authentic quantification standards and suitable methods of analysis. To overcome these challenges, a series of organosulfates standards was synthesized and used to develop and validate of a new analytical method for their quantification. Recent results from the application of this method to ambient aerosol collected in Centreville, Alabama during the Southeast Atmosphere Study (SAS) in 2013 will be discussed.