Influence of temperature on the polarity of porous polymer beads stationary phases for gas chromatography

The change in polarity as a function of temperature of gas chromatographic columns packed with Porapak and Chromosorb 'Century series' porous polymer beads was investigated by using as a polarity indicator the difference in apparent carbon number of linear alkanes and alcohols with the same retention time, Delta C. The results were compared with those obtained by using the retention indices of the McReynolds' probes and the retention of light hydrocarbons. Some capillary columns with porous polymeric layer were compared with the corresponding type of polymer beads in packed columns. (C) 1999 Elsevier Science B.V. All rights reserved.