Electrochemically modulated liquid chromatographic separation of triazines and the effect of pH on their retention

ANYL 310

Betsy Jean Yakes, byakes@iastate.edu, David W. Keller, and Marc D. Porter, mporter@porter1.ameslab.gov. Departments of Chemistry and Chemical and Biological Engineering, Iowa State University, Ames Laboratory-USDOE, and Institute for Combinatorial Discovery, Ames, IA 50011
Electrochemically modulated liquid chromatography (EMLC) is a unique combination of liquid chromatography and electrochemistry. In EMLC, analyte retention is manipulated by changing the potential applied (Eapp) to a conductive stationary phase such as porous graphitic carbon (PGC). This presentation will introduce the application of EMLC to the separation for triazines, a commonly used yet environmentally harmful class of herbicides. Results will be shown that (1) elucidate the merits of using EMLC to separate herbicides; (2) demonstrate the rapid separation of a mixture of seven different triazines; and (3) probe the effect of the mobile phase pH on the retention of triazines with different acid strengths. Preliminary insights into the retention mechanism will also be discussed.
 

Analytical Approaches: Separation Science
8:30 AM-12:00 PM, Thursday, 14 September 2006 Moscone Center -- Room 130, Oral

Division of Analytical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006