Determination of polyphenol components of Lonicera japonica Thunb. using liquid chromatography-tandem mass spectrometry: Contribution to the overall antioxidant activity

► Polyphenol mixture was isolated from the tissues of Lonicera japonica Thunb. ► Polyphenol components were determined by HPLC-UV-MS/MS. ► The antioxidant activities of polyphenol mixture were evaluated.