Identification of phenolic compounds in Australian grown dragon fruits by LC-ESI-QTOF-MS/MS and determination of their antioxidant potential

Dragon fruit is a popular tropical that has high phenolic content which are the main contributors to antioxidant potential and health benefits of dragon pulp peel waste. Although some compounds in have previously been reported, comprehensive analysis complete profile Australian varieties not conducted. Thus, aim this study was extract, identify quantify phenolics from fruits grown Australia. Phenolic were extracted peels pulps white red fruit. determined by total (TPC), flavonoid (TFC) tannin (TTC), while activities measured 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing power (FRAP), 2,2?-Azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) capacity (TAC). The results showed had higher stronger than peel, flavonoids tannins pulp. Liquid chromatography electrospray ionization quadrupole time-of-flight mass spectrometry (LC-ESI-QTOF-MS/MS) used for characterization compounds, 80 including acids (25), (38), lignans (6), stilbene (3) other polyphenols (8) characterized all fruits. High performance liquid equipped with photodiode array detector (HPLC-PDA) quantified different portion concentrations highlighted both sources particular being source as ingredients food pharmaceutical industries.