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Open AccessArticle

Hydroxypropyl-β-Cyclodextrin as a Green Co-Solvent in the Aqueous Extraction of Polyphenols from Waste Orange Peels

Green Processes & Biorefinery Group, Department of Food Science & Nutrition, School of Agricultural Sciences, University of Thessaly, N. Temponera Str., 43100 Karditsa, Greece
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Author to whom correspondence should be addressed.
Received: 4 June 2020 / Revised: 23 June 2020 / Accepted: 3 August 2020 / Published: 10 August 2020
(This article belongs to the Special Issue Phenolic Compounds and Functional Beverages)
There is, to-date, an expanding interest concerning the use of cyclodextrins as green food-grade co-solvents in the aqueous extraction of polyphenols, however, data regarding polyphenol extraction from waste orange peels (WOP) are lacking. On this ground, hydroxypropyl β-cyclodextrin (HP-β-CD), a highly water-soluble cyclodextrin, was used to develop a simple and straightforward methodology for the effective recovery of WOP polyphenols. Process optimization by response surface showed that maximum total polyphenol recovery (26.30 ± 1.49 mg gallic acid equivalents g−1 dry mass) could be accomplished with 15 mM HP-β-CD at 40 °C. On the other hand, integration of ultrasonication pretreatment was found unsuitable, as it resulted in reduced polyphenol yield. Examination of solvent acidity indicated that polyphenol extraction may be enhanced at pH 4, but the difference was non-significant (p > 0.05) compared to yields attained at pH 2, 3, and 5. Extraction of WOP polyphenols with HP-β-CD was shown to provide significantly higher hesperidin yield compared to 60% (v/v) aqueous ethanol, which suggested selectivity of HP-β-CD toward this polyphenolic metabolite. View Full-Text
Keywords: antioxidants; extraction; hydroxypropyl β-cyclodextrin; orange peels; polyphenols antioxidants; extraction; hydroxypropyl β-cyclodextrin; orange peels; polyphenols
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MDPI and ACS Style

Lakka, A.; Lalas, S.; Makris, D.P. Hydroxypropyl-β-Cyclodextrin as a Green Co-Solvent in the Aqueous Extraction of Polyphenols from Waste Orange Peels. Beverages 2020, 6, 50. https://0-doi-org.brum.beds.ac.uk/10.3390/beverages6030050

AMA Style

Lakka A, Lalas S, Makris DP. Hydroxypropyl-β-Cyclodextrin as a Green Co-Solvent in the Aqueous Extraction of Polyphenols from Waste Orange Peels. Beverages. 2020; 6(3):50. https://0-doi-org.brum.beds.ac.uk/10.3390/beverages6030050

Chicago/Turabian Style

Lakka, Achillia; Lalas, Stavros; Makris, Dimitris P. 2020. "Hydroxypropyl-β-Cyclodextrin as a Green Co-Solvent in the Aqueous Extraction of Polyphenols from Waste Orange Peels" Beverages 6, no. 3: 50. https://0-doi-org.brum.beds.ac.uk/10.3390/beverages6030050

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