The FT-IR spectrum for the anthocyanin extract shows a strong
absorption band with a maximum at 1015 cm1 assigned to aromatic
ring CeH deformation, as well as bands at 1650 and
1455 cm1 corresponding to the stretching vibration of the C]C
aromatic ring. The absorption band with a maximum at 1233 cm1
is assigned to stretching of pyran rings, typical of flavonoid compounds.