Fig. 4
From: Production of oligomeric procyanidins by mild steam explosion treatment of grape seeds
NP-HPLC chromatogram of unexploded grape seeds extract and mixed standard solutions (1 = monomer, 2 = dimers, 3 = trimer, 4 = tetramer) (a); mobile phases A = acetonitrile/acetic acid (98:2, v/v) (b); mobile phases A = acetonitrile/water (98:2, v/v) (c); mixed standard (CA/EC + ECG + Dimers + C1 + A2) (d)