Molecular recognition towards coplanar polychlorinated biphenyls based on the porogen imprinting effects of xylenes

Molecularly imprinted, uniformly sized polymeric separation media were prep ared using o-, m- or p-xylene as a porogenic template to investigate recogn ition ability towards coplanar polychlorinated biphenyls (PCBs). PCBs havin g chlorine atoms at meta positions of biphenyl were preferably retained on stationary phase with m-xylene as porogenic template and PCBs having chlori ne atoms at para positions of biphenyl were found to be retained longer on the stationary phase imprinted by the porogenic template, p-xylene. It was found that positional relationship between substituted chlorine atoms was a lso important for chromatographic recognition. (C) 1998 Elsevier Science B. V. All rights reserved.