DETERMINATION OF CROSS-LINKING REAGENT, DIVINYLBENZENE IN POLYSTYRENE-TYPE ION-EXCHANGE RESIN PRECURSORS WITH CHLOROMETHYL SUBSTITUENTS BY PYROLYSIS-GAS CHROMATOGRAPHY IN AIDING PRELIMINARY REDUCTION OF CHLORINE ATOMS IN THE SAMPLES

Cross-linking reagents, divinylbenzene (DVB) in polystyrene-type ion e xchange resin precursors with chloromethyl substituents were determine d by pyrolysis-gas chromatography (PY-GC) in aiding preliminary reduct ion of chlorine atoms in the samples. The characteristic peaks of DVB or its derivatives were completely separated on the pyrograms of the r educed precursors. The relative peak intensities (I-rel) of DVB or its derivatives were calculated from their peak area, and interpreted in terms of the amounts of cross-linking reagents introduced into the res in precursors synthesized by different synthetic pathways. (C) 1997 El sevier Science Ltd.