COMPARISON OF THE RETENTION BEHAVIOR OF POLYETHOXYLATED ALCOHOLS ON POROUS GRAPHITIC CARBON AND POLAR AS WELL AS APOLAR BONDED-SILICA PHASES

Porous graphitic carbon (Hypercarb S) is presented as a suitable packi ng for the analysis of polyethoxylated alcohol surfactants by using or ganic solvents. The separation mechanism is different from that found in normal-phase liquid chromatography and reversed-phase liquid chroma tography. This packing permits to analyse simultaneously polyethylene glycol and polyethoxylated alcohol mixtures under gradient elution usi ng water-acetonitrile then acetonitrile-dichloromethane mixtures as mo bile phase with evaporative light scattering detection. (C) 1998 Elsev ier Science B.V.