The beverages extracted with hot water were passed through Sep-Pak C18 cartridges (Waters) and 0.45 mm membrane filters (Millipore Co., Bedford, MA, USA), and injected into the HPLC (Waters).
The beverages extracted with hot waterwere passed through Sep-Pak C18 cartridges (Waters) and 0.45 mmmembrane filters (Millipore Co., Bedford, MA, USA), and injectedinto the HPLC (Waters).