The strongest adsorption of anthocyanins was obtained with the polymeric adsorbents, and the weakest with the strong
cation exchange resins in Na+ form (Fig. 5). Of the polymeric adsorbents, anthocyanins were most strongly adsorbed
to those with PS–DVB matrices. This was due to the strong affinity between the aromatic anthocyanins and the aromatic
resin matrices. The cation exchange resins also had PS–DVB matrices, but the sulfonic acid functional groups reduced the
affinity considerably