(a)
(b)
(c)
Figure 1: Chromatograms of (a) polyphenol standards, (b) polyphenols extracted using C18 cartridges, and (c) polyphenols extracted using Amberlite XAD-2 resin. Gallic acid (GAL), benzoic acid (BNZ), dihydroxybenzoic acid (DHB), naringenin (NGE), naringin (NGI), rutin (RTN), quercetin (QCT), trans-cinnamic acid (TCM), and vanillic acid (VNL).