From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes

<i>Pistacia lentiscus</i> L., commonly known as the mastic tree or lentisk, is a woody Mediterranean plant revered for its ecological relevance as well as for its extensive ethnobotanical heritage. Historically, the fruits and the resin of <i>P. lentiscus</i> have been widely...

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Main Authors: Lucrezia Muti, Luana Beatriz dos Santos Nascimento, Giulia Goracci, Cassandra Detti, Cecilia Brunetti, Anna Rita Bilia, Francesco Ferrini, Antonella Gori
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Molecules
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Online Access:https://www.mdpi.com/1420-3049/30/2/237
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author Lucrezia Muti
Luana Beatriz dos Santos Nascimento
Giulia Goracci
Cassandra Detti
Cecilia Brunetti
Anna Rita Bilia
Francesco Ferrini
Antonella Gori
author_facet Lucrezia Muti
Luana Beatriz dos Santos Nascimento
Giulia Goracci
Cassandra Detti
Cecilia Brunetti
Anna Rita Bilia
Francesco Ferrini
Antonella Gori
author_sort Lucrezia Muti
collection DOAJ
description <i>Pistacia lentiscus</i> L., commonly known as the mastic tree or lentisk, is a woody Mediterranean plant revered for its ecological relevance as well as for its extensive ethnobotanical heritage. Historically, the fruits and the resin of <i>P. lentiscus</i> have been widely utilized in traditional medicine, underscoring its important role in local healing practices. Given these properties, this study explored an innovative approach to efficiently extract anthocyanins and flavonols from <i>P. lentiscus</i> oilcakes utilizing ultrasound-assisted extraction (UAE) as an alternative to conventional solvent extraction. Liquid chromatography–mass spectrometry (LC-MS) and high-performance liquid chromatography with diode-array detection (HPLC-DAD) were used to identify and quantify the anthocyanins and flavonols, revealing the successful extraction of eight distinct anthocyanins and twenty flavonols. A Fractional Factorial Design (FFD) followed by a Box–Behnken design (BBD) were applied to optimize the yield of anthocyanins and flavonols. The optimal extraction conditions found were to be an extraction time of 15 min with 70% ethanol as the solvent and a liquid-to-solid ratio of 0.012 L g<sup>−1</sup>, which resulted in a maximum extraction yield of 19.78 mg g<sup>−1</sup> dry extract for the Total Flavonol Content and over 25.4 mg g<sup>−1</sup> dry extract for the Total Flavonol and Anthocyanin Content. By elucidating the optimal conditions for extracting anthocyanins and flavonol glycosides, this study opens promising avenues for utilizing <i>P. lentiscus</i> oilcake by-products, supporting sustainable practices, and advancing the valorization of Mediterranean bio-resources for health-promoting applications.
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spelling doaj-art-e7bf6f9aed304cb580084d81325fedc02025-01-24T13:43:13ZengMDPI AGMolecules1420-30492025-01-0130223710.3390/molecules30020237From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. OilcakesLucrezia Muti0Luana Beatriz dos Santos Nascimento1Giulia Goracci2Cassandra Detti3Cecilia Brunetti4Anna Rita Bilia5Francesco Ferrini6Antonella Gori7Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Chemistry, University of Florence, Via U. Schiff 6, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Chemistry, University of Florence, Via U. Schiff 6, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, ItalyDepartment of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Sesto Fiorentino, 50019 Florence, Italy<i>Pistacia lentiscus</i> L., commonly known as the mastic tree or lentisk, is a woody Mediterranean plant revered for its ecological relevance as well as for its extensive ethnobotanical heritage. Historically, the fruits and the resin of <i>P. lentiscus</i> have been widely utilized in traditional medicine, underscoring its important role in local healing practices. Given these properties, this study explored an innovative approach to efficiently extract anthocyanins and flavonols from <i>P. lentiscus</i> oilcakes utilizing ultrasound-assisted extraction (UAE) as an alternative to conventional solvent extraction. Liquid chromatography–mass spectrometry (LC-MS) and high-performance liquid chromatography with diode-array detection (HPLC-DAD) were used to identify and quantify the anthocyanins and flavonols, revealing the successful extraction of eight distinct anthocyanins and twenty flavonols. A Fractional Factorial Design (FFD) followed by a Box–Behnken design (BBD) were applied to optimize the yield of anthocyanins and flavonols. The optimal extraction conditions found were to be an extraction time of 15 min with 70% ethanol as the solvent and a liquid-to-solid ratio of 0.012 L g<sup>−1</sup>, which resulted in a maximum extraction yield of 19.78 mg g<sup>−1</sup> dry extract for the Total Flavonol Content and over 25.4 mg g<sup>−1</sup> dry extract for the Total Flavonol and Anthocyanin Content. By elucidating the optimal conditions for extracting anthocyanins and flavonol glycosides, this study opens promising avenues for utilizing <i>P. lentiscus</i> oilcake by-products, supporting sustainable practices, and advancing the valorization of Mediterranean bio-resources for health-promoting applications.https://www.mdpi.com/1420-3049/30/2/237lentiskoilcakegreen extractiondesign of experimentwaste recovery
spellingShingle Lucrezia Muti
Luana Beatriz dos Santos Nascimento
Giulia Goracci
Cassandra Detti
Cecilia Brunetti
Anna Rita Bilia
Francesco Ferrini
Antonella Gori
From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
Molecules
lentisk
oilcake
green extraction
design of experiment
waste recovery
title From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
title_full From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
title_fullStr From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
title_full_unstemmed From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
title_short From Waste to Value: Optimization of Ultrasound-Assisted Extraction of Anthocyanins and Flavonols from <i>Pistacia lentiscus</i> L. Oilcakes
title_sort from waste to value optimization of ultrasound assisted extraction of anthocyanins and flavonols from i pistacia lentiscus i l oilcakes
topic lentisk
oilcake
green extraction
design of experiment
waste recovery
url https://www.mdpi.com/1420-3049/30/2/237
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