Purification of Anthocyanins with o-Dihydroxy Arrangement by Sorption in Cationic Resins Charged with Fe(III)

Figure 1

Chemical structures of anthocyanins with o-dihydroxy arrangement; (a) cyanidin (Cy), (b) delphinidin (Dp) y, (c) petunidin (Pt). R = monosaccharide or disaccharide.

(a)

(b)

(c)