Properties of thermally modified controlled porous glasses (CPG) I. Influence of additional thermal treatment of CPG on adsorption processes on its surface

Abstract

Controlled porous glasses (CPG) are the sorbents and supports of chemically bonded phases very widely applied in chromatographic columns for the separation of polymers and biopolymers by means of gel permeation and affinity chromatography. The chemical structure of CPG surface can easily be changed by additional heating of porous glass. Such thermal modification leads to the enrichment of the surface in boron atoms. In consequence, the the prepared materials possess specific surface properties. In this paper some adsorption isotherms obtained for chemically different compounds on the CPG surfaces thermally treated in various ways are presented.