160-8 Study Interactions Between Dissolved Organic Matter and Pharmaceuticals by Solid Phase Extraction and Liquid Chromatography/Tandem Mass Spectrometry.



Monday, October 17, 2011: 3:20 PM
Henry Gonzalez Convention Center, Room 210A, Concourse Level

Yunjie Ding and Hui Li, Michigan State University, East Lansing, MI
An innovative method was developed to determine interactions between pharmaceuticals and dissolved organic matter (DOM) using solid phase extraction. DOM and DOM-associate pharmaceuticals could pass through a selected solid phase cartridge while the cartridge retained their corresponding free species in water. This method has been validated and compared the results obtained using the acceptable dialysis-membrane method. We further measured the associations of a series of pharmaceuticals commonly found in the environment with DOM using this method. The magnitudes of the interactions were ranked, and related to the specific physicochemical properties of the pharmaceuticals.
See more from this Division: S11 Soils & Environmental Quality
See more from this Session: Dissolved Organic Matter (DOM): Fate and Role In Soil and Environmental Processes