INTRODUCTION: Olea europaea L. leaves may be considered a cheap, easily available natural source of phenolic compounds. In a previous study we evaluated the possibility of obtaining bioactive phenolic compounds from olive leaves by pressurised liquid extraction (PLE) for their use as natural anti-oxidants. The alimentary use of these kinds of extract makes comprehensive knowledge of their composition essential. OBJECTIVE: To undertake a comprehensive characterisation of two olive-leaf extracts obtained by PLE using high-performance liquid chromatography coupled to electrospray ionisation and quadrupole time-of-flight mass spectrometry (HPLC-ESI-QTOF-MS). METHOD: Olive leaves were extracted by PLE using ethanol and water as extraction solvents at 150°C and 200°C respectively. Separation was carried out in a HPLC system equipped with a C₁₈-column working in a gradient elution programme coupled to ESI-QTOF-MS operating in negative ion mode. RESULTS: This analytical platform was able to detect 48 compounds and tentatively identify 31 different phenolic compounds in these extracts, including secoiridoids, simple phenols, flavonoids, cinnamic-acid derivatives and benzoic acids. Lucidumoside C was also identified for the first time in olive leaves. CONCLUSION: The coupling of HPLC-ESI-QTOF-MS led to the in-depth characterisation of the olive-leaf extracts on the basis of mass accuracy, true isotopic pattern and tandem mass spectrometry (MS/MS) spectra. We may conclude therefore that this analytical tool is very valuable in the study of phenolic compounds in plant matrices.
INTRODUCTION:Olea europaea L. leaves may be considered a cheap, easily available natural source of phenolic compounds. In a previous study we evaluated the possibility of obtaining bioactive phenolic compounds from olive leaves by pressurised liquid extraction (PLE) for their use as natural anti-oxidants. The alimentary use of these kinds of extract makes comprehensive knowledge of their composition essential. OBJECTIVE: To undertake a comprehensive characterisation of two olive-leaf extracts obtained by PLE using high-performance liquid chromatography coupled to electrospray ionisation and quadrupole time-of-flight mass spectrometry (HPLC-ESI-QTOF-MS). METHOD:Olive leaves were extracted by PLE using ethanol and water as extraction solvents at 150°C and 200°C respectively. Separation was carried out in a HPLC system equipped with a C₁₈-column working in a gradient elution programme coupled to ESI-QTOF-MS operating in negative ion mode. RESULTS: This analytical platform was able to detect 48 compounds and tentatively identify 31 different phenolic compounds in these extracts, including secoiridoids, simple phenols, flavonoids, cinnamic-acid derivatives and benzoic acids. Lucidumoside C was also identified for the first time in olive leaves. CONCLUSION: The coupling of HPLC-ESI-QTOF-MS led to the in-depth characterisation of the olive-leaf extracts on the basis of mass accuracy, true isotopic pattern and tandem mass spectrometry (MS/MS) spectra. We may conclude therefore that this analytical tool is very valuable in the study of phenolic compounds in plant matrices.
Authors: Matteo Micucci; Marco Malaguti; Tullia Gallina Toschi; Giuseppe Di Lecce; Rita Aldini; Andrea Angeletti; Alberto Chiarini; Roberta Budriesi; Silvana Hrelia Journal: Oxid Med Cell Longev Date: 2015-06-09 Impact factor: 6.543
Authors: María de la Luz Cádiz-Gurrea; Salvador Fernández-Arroyo; Antonio Segura-Carretero Journal: Int J Mol Sci Date: 2014-11-06 Impact factor: 5.923
Authors: Cecilia Jiménez-Sánchez; Mariló Olivares-Vicente; Celia Rodríguez-Pérez; María Herranz-López; Jesús Lozano-Sánchez; Antonio Segura-Carretero; Alberto Fernández-Gutiérrez; José Antonio Encinar; Vicente Micol Journal: PLoS One Date: 2017-03-09 Impact factor: 3.240
Authors: Natalie P Bonvino; Julia Liang; Elizabeth D McCord; Elena Zafiris; Natalia Benetti; Nancy B Ray; Andrew Hung; Dimitrios Boskou; Tom C Karagiannis Journal: Database (Oxford) Date: 2018-01-01 Impact factor: 3.451