Insearchofasuitableadsorbentusedfortheenrichmentandseparationofnaturalsaponinsfromanaqueoussolution,aseriesofporouscross-linkedpoly(vinylaceto-phenone)resinsI-ⅨweresynthesizedviatheFriedel-Craftsacylationofstyrene-pinyl-benzenecopolymerbeads.Theircarbonylcontentswerecharacterizedbyinfraredspectraandelementalanalysis.Theirphysicalpropertiessuchasbulkdensities,skeletondensities,andspecificsurfaceareaswerealsodetermined.Thetestsfortheresinsadsorptionofgypenosidesshowedthatonlythoseresinswithhighcarbonylcontentsandlargespecificsurfaceareascouldfavorablyadsorbgypenosidesfromanaqueoussolutionwithmuchhighercapacities.