Oblon, Fisher, Spivak, McClelland & Maier
Gel chromatography material
 A mixture of water-soluble substances, particularly a mixture of proteins, a mixture of enzymes or a mixture of water-soluble vitamins, is fractionated by subjecting an aqueous solution of said mixture of water-soluble substances to gel chromatography through a filter bed of a cross-linked gel copolymer of vinylpyrrolidone and a cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each radical is selected from the group consisting of --CH.sub.2 --CH.dbd.CH.sub.2, --CH.sub.2 --C.tbd.CH and --CH.sub.2 --C(CH).sub.2, in a diluent. 
Kureha Kagaku Kogyo Kabushiki Kaisha
C B Y B B
C08F B01J Y10S B01J B01J
inventional additional additional inventional inventional
Noriyuki Naohiro Teruo
Arakawa Murayama Sakagami