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Open AccessArticle

Water as a Solvent of Election for Obtaining Oleuropein-Rich Extracts from Olive (Olea europaea) Leaves

1
Di3A, Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, via S. Sofia 100, 95123 Catania, Italy
2
CNR-ICB, Consiglio Nazionale delle Ricerche-Istituto di Chimica Biomolecolare, via Paolo Gaifami 18, 95126 Catania, Italy
3
Dipartimento di Scienze Agrarie, Alimentari e Forestali, University of Palermo, Viale delle Scienze Ed.4, 90128 Palermo, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Valentina Scariot
Agronomy 2021, 11(3), 465; https://doi.org/10.3390/agronomy11030465
Received: 8 February 2021 / Revised: 23 February 2021 / Accepted: 25 February 2021 / Published: 3 March 2021
(This article belongs to the Special Issue Phytochemicals of Edible Plants in Human Health)
Leaves from Olea europaea represent one of the main by-products of the olive oil industry, containing a plethora of bioactive compounds with several promising activities for human health. An organic solvent-free extraction method was developed for the recovery of olive leaf phenols, which obtained an extract containing oleuropein in high amounts. A comparison of various extraction media is reported, together with the total phenolic content, DPPH (2,2-Diphenyl-1-picrylhydrazyl) content, ORAC (oxygen radical absorbance capacity), and polyphenol oxidase activity of the corresponding extracts. The polyphenol profiles and content of the most representative extracts have also been studied. Extraction solvent and temperature significantly influenced the phenolic content and antioxidant activity of the extracts, with hot water representing the solvent of election for the extraction of bioactive compounds from this matrix. All the extracts obtained showed reasonably high total phenol content (TPC) and good DPPH radical scavenging activity; among them, the water extract is characterized by desirable traits and could be used for many industrial applications and human consumption. View Full-Text
Keywords: Olea europaea; oleuropein; aqueous extraction; radical scavenging activity; bioactive compounds recovery Olea europaea; oleuropein; aqueous extraction; radical scavenging activity; bioactive compounds recovery
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MDPI and ACS Style

Monteleone, J.I.; Sperlinga, E.; Siracusa, L.; Spagna, G.; Parafati, L.; Todaro, A.; Palmeri, R. Water as a Solvent of Election for Obtaining Oleuropein-Rich Extracts from Olive (Olea europaea) Leaves. Agronomy 2021, 11, 465. https://doi.org/10.3390/agronomy11030465

AMA Style

Monteleone JI, Sperlinga E, Siracusa L, Spagna G, Parafati L, Todaro A, Palmeri R. Water as a Solvent of Election for Obtaining Oleuropein-Rich Extracts from Olive (Olea europaea) Leaves. Agronomy. 2021; 11(3):465. https://doi.org/10.3390/agronomy11030465

Chicago/Turabian Style

Monteleone, Julieta I.; Sperlinga, Elisa; Siracusa, Laura; Spagna, Giovanni; Parafati, Lucia; Todaro, Aldo; Palmeri, Rosa. 2021. "Water as a Solvent of Election for Obtaining Oleuropein-Rich Extracts from Olive (Olea europaea) Leaves" Agronomy 11, no. 3: 465. https://doi.org/10.3390/agronomy11030465

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