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Optimization of the extraction of phenolic compounds from walnut leaves using DES.

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dc.contributor.authorVieira, Vanessa
dc.contributor.authorPrieto Lage, Miguel A.
dc.contributor.authorBarros, Lillian
dc.contributor.authorCoutinho, João A.P.
dc.contributor.authorFerreira, Olga
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2018-02-12T16:55:15Z
dc.date.available2018-02-12T16:55:15Z
dc.date.issued2017
dc.description.abstractDeep eutectic solvents (DES) are a new generation of alternative solvents resulting from the mixture of two (or more) starting materials where the eutectic temperature of the mixture is considerably lower than the melting point of the individual components [1]. DES can be considered “designer solvents” due to the possibility of combining different hydrogen bond acceptors and donors, to obtain solvents with specific affinity to the target molecules. Among their many applications is the potential use of DES as both solvents and formulation media of extracts rich in phenolic compounds [2]. In this work, the heat assisted extraction of phenolic compounds from walnut leaves was optimized, using DES based on choline chloride (CC) and carboxylic acids. To evaluate the response, the main phenolic compounds present in the extract (acid 3-O-caffeyloquinic acid, quercetin 3-O-glucoside and quercetin O-pentoside) were determined by HPLC-DAD. From a preliminary solvent screening, butyric acid (BA) and phenylpropionic acid (PPA) were selected as hydrogen bond donors. The extraction conditions (time, temperature and water content) were then optimized by an experimental design, assisted by response surface methodology. Water content was the most relevant extraction variable, followed by temperature and, lastly, extraction time. Under the optimized conditions, it was possible to obtain a response of 37.9±4.0 mg/g dw for CC:BA and 31.7±4.2 mg/g dw, for CC:PPA. Compared to the traditional water + ethanol reference solvent, similar or higher extraction yields were obtained using the selected DES.pt_PT
dc.description.sponsorshipCICECO, for financial support to Project UID/CTM/50011/2013 and PTDC/AGR-TEC/1191/2014. CIMO, for financial support to Project UID/AGR/00690/2013. LSRE-LCM for financial support to Project POCI-01-0145-FEDER-006984. To Xunta de Galicia, for financial support for the post-doctoral researcher of M.A. Prieto. The authors thank the Foundation for Science and Technology (FCT, Portugal), Lillian Barros for the research grant SFRH/BPD/107855/2015 and Vanessa Vieira research grant SFRH/BD/108487/2015pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationVieira, Vanessa; Prieto, Miguel; Barros, Lillian; Coutinho, João A.P.; Ferreira, Olga; Ferreira, Isabel C.F.R. (2017). Optimization of the extraction of phenolic compounds from walnut leaves using DES. In 10º Encontro Nacional de Cromatografia. Bragança. ISBN 978-972-745-234-7pt_PT
dc.identifier.urihttp://hdl.handle.net/10198/15697
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstituto Politécnico de Bragançapt_PT
dc.relationNatural Deep Eutectic Solvents: A platform to Boost Eucalyptus globulus and Quercus suber cork integrated Biorefineries
dc.relationProviding industry and consumers with new alternative sources of natural additives from plant origin in the classes of preservatives and colouring agents: extraction, purification, stabilization and product development
dc.relationUsing natural deep eutectic solvents for the extraction of bioactive compounds from plant material: valorizing walnut residues through the development of bio-based semi-solid formulas for topical use
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleOptimization of the extraction of phenolic compounds from walnut leaves using DES.pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleNatural Deep Eutectic Solvents: A platform to Boost Eucalyptus globulus and Quercus suber cork integrated Biorefineries
oaire.awardTitleProviding industry and consumers with new alternative sources of natural additives from plant origin in the classes of preservatives and colouring agents: extraction, purification, stabilization and product development
oaire.awardTitleUsing natural deep eutectic solvents for the extraction of bioactive compounds from plant material: valorizing walnut residues through the development of bio-based semi-solid formulas for topical use
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F50011%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FAGR-TEC%2F1191%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00690%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F107855%2F2015/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F108487%2F2015/PT
oaire.citation.conferencePlaceBragança, Portugalpt_PT
oaire.citation.title10º Encontro Nacional de Cromatografiapt_PT
oaire.fundingStream5876
oaire.fundingStream9471 - RIDTI
oaire.fundingStream5876
person.familyNamePrieto Lage
person.familyNameBarros
person.familyNameFerreira
person.familyNameFerreira
person.givenNameMiguel A.
person.givenNameLillian
person.givenNameOlga
person.givenNameIsabel C.F.R.
person.identifier107688
person.identifier469085
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person.identifier.ciencia-id221E-1E00-AB74
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person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0002-3513-0054
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0001-8414-3479
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridG-4516-2011
person.identifier.ridJ-3600-2013
person.identifier.ridM-4567-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id35937495700
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id57203083219
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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