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Fluorescence-HPLC of 5× cranberry juice concentrate (A), and eluted proanthocyanidins from cranberry polyphenol-enriched soy protein isolate (B). HPLC conditions: Develiosil Diol column, Solvent A: acidic acetonitrile; Solvent B: aqueous acidic methanol, fluorescence excitation and emission wavelengths 230 and 321 nm.
