title: Phenolic profile characterization of Chemlali olive stones by liquid chromatography-ion trap mass spectrometry.
abstract: Aqueous methanol extracts of Chemlali olive stones were analyzed by reverse phase high-performance liquid chromatography (HPLC) with diode array detection and mass spectrometry [LC-MS/MS]. Oleoside, oleoside 11-methyl ester, nuezhenide, oleoside 11-methyloleoside, nuezhenide 11-methyloleoside, oleuropein, and glycosides of tryosol and hydroxytyrosol glycosides were identified in stones of Chemali olives. The antioxidant activity observed for the extract of the olive stones (IC50 = 13.84 μg/mL, TEAC = 0.436 mM) may be due to the high content of phenolic compounds, of which the main compounds are nuezhenide (325.78 mg/100g), methoxy derivative of nuezhenide (132.46 mg/100g), and nuezhenide-11-methyloleoside (82.91 mg/100g). These results suggest the use of olive stones as sources of natural antioxidants.
authors: Laboratoire d'Electrochimie et Environnement, Ecole Nationale d'Ingénieurs de Sfax BP ⟨⟨1173⟩⟩ 3038, Université de Sfax , Sfax, Tunisie.
authors: Amir
authors: A
authors: Ben Mansour
authors: Elaine A
authors: EA
authors: Porter
authors: Geoffrey C
authors: GC
authors: Kite
authors: Monique S J
authors: MS
authors: Simmonds
authors: Ridha
authors: R
authors: Abdelhedi
authors: Mohamed
authors: M
authors: Bouaziz
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods*; D031658:Olea / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010636:Phenols; D010936:Plant Extracts
keywords: Chemlali olive stones; antioxidant activity; mass spectrometry; nuezhenide-11-methyl-oleoside; phenolic compounds