RETENTION OF PYRIDINECARBOXYLIC ACIDS ON MONOMERIC AND POLYMERIC ALKYLAMIDE PHASES

摘要

Retention of pyridinecarboxylic acids was studied on monomeric and polymeric alkylamide phases with C-6 and C-12 terminal alkyl chains at different pH values and various concentrations of acetonitrile in the mobile phase. It was shown that the retention of these acids on both types of alkylamide phases is significantly influenced by the pH of the mobile phase. The pH effect was more pronounced for polymeric phases, which for this reason appeared to be better for the simultaneous separation of ionic and non-ionic solutes.