A UHPLC system (UHPLC, Thermo Fisher Scientific, Waltham, MA, USA) was used for quantification and separation of polyphenolic compounds. A Q Exactive Orbitrap LC–MS/MS (Thermo Fisher Scientific, Waltham, MA, USA) was employed to facilitate the analysis of the mass spectrometry. The details of UHPLC-high-resolution mass spectrometry analysis are as described by Graziani et al. [20 (link)].
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