Polyphenol Extraction by Different Techniques for Valorisation of Non-Compliant Portuguese Sweet Cherries towards a Novel Antioxidant Extract

Ana A. Vilas-Boas, Débora A. Campos, Catarina Nunes, Sónia Ribeiro, João Nunes, Ana Oliveira and Manuela Pintado
Additional contact information
Ana A. Vilas-Boas: CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-374 Porto, Portugal
Débora A. Campos: CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-374 Porto, Portugal
Catarina Nunes: Association BLC3—Technology and Innovation Campus, Centre Bio R&D Unit, Senhora da Conceição, 3045-155 Oliveira do Hospital, Portugal
Sónia Ribeiro: Association BLC3—Technology and Innovation Campus, Centre Bio R&D Unit, Senhora da Conceição, 3045-155 Oliveira do Hospital, Portugal
João Nunes: Association BLC3—Technology and Innovation Campus, Centre Bio R&D Unit, Senhora da Conceição, 3045-155 Oliveira do Hospital, Portugal
Ana Oliveira: CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-374 Porto, Portugal
Manuela Pintado: CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, 4200-374 Porto, Portugal

Sustainability, 2020, vol. 12, issue 14, 1-23

Abstract: Currently, there is special interest in the recovery of polyphenols from non-compliant fruits that have no market value; efforts to find value-added solutions for these food areas are a key option for a sustainable bio-economy. Saco cherries are a traditional Portuguese cherry variety, and although they are a nutritionally important food, rich in powerful dietary polyphenols, significant amounts of these cherries are not sold due to their small size. In this context, this work aimed to select the best method to produce novel antioxidant polyphenol-rich extracts from low calibre and non-compliant Saco cherries. Based on the results, microwaves-assisted extraction (MAE) allowed us to obtain a polyphenol-rich extract with a high antioxidant capacity (50.46 ± 1.58 mg Trolox equivalent (TE)/g dry extract (DE) by oxygen radical absorbance capacity (ORAC), 10.88 ± 0.38 mg ascorbic acid equivalent (AA)/g DE by 2-azinobis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS), and 9.58 ± 0.42 mg TE/g DE by 2,2-diphenyl-1-picrylhydrazyl (DPPH)) and a high content of polyphenols, namely, hydroxycinnamic acids (neochlorogenic and p -coumaric acids) and anthocyanins (cyanidin-3-rutinoside and cyanidin-3-glucoside), compared with those of conventional extractions with low and high temperature and ultrasound-assisted extraction. The antioxidant extract produced from MAE could be a new alternative for the valorisation of non-compliant cherries since these extracts proved to be a functional ingredient due to the high content of antioxidants, which are linked to the prevention of diseases.

Keywords: Saco cherry; non-compliant; polyphenols; antioxidant activity; extraction method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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