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The UPLC-UV-visible chromatogram (270 nm) for the fractions from herbal teas and green teas. (a) (b) (c) (d) represent the chromatogram of the two fractions of Mallotus oblongifolius Muell. Arg. (MO), Ilex kudingcha C.J. Tseng (KD), Camellia sinensis var. assamica (J. W. Mast.) Kitam. Hainan Dayezhong (DY) and Camellia sinensis (L.) O. Ktze. (BS), respectively.
