Repository logo
 
Publication

Evaluation of Tunisian olive oils from different cultivars

2016Conference poster Open access
Simple item page
dc.contributor.authorSlim, Souihli
dc.contributor.authorRodrigues, Nuno
dc.contributor.authorDias, L.G.
dc.contributor.authorVeloso, Ana C.A.
dc.contributor.authorPereira, J.A.
dc.contributor.authorOueslati, Souheib
dc.contributor.authorPeres, António M.
dc.date.accessioned2018-02-20T11:44:34Z
dc.date.available2018-02-20T11:44:34Z
dc.date.issued2016
dc.description.abstractOlive oil is a highly appreciated food product due to sensory and healthy attributes, being quite prone to frauds. So, physicochemical evaluation of olive oils is legally required. In this study, 43 olive oil samples produced in Tunisia from different olive cultivars (groups: Sahli cv – 11 samples; Chetoui cv- 26 samples; and, Other cvs – 4 samples including Leguim cv and Arbequina cv) were physicochemically evaluated taking into account: (i) free acidity (FA), K232 and K270 extinction coefficients, ΔK, and, peroxide values (PV), required for quality level classification (i.e., extra-virgin, virgin and lampante olive oil: EVOO, VOO and LOO); and (ii) other useful data for olive oil overall characterization (total phenols (TP); antioxidant capacity (DPPH); and, oxidative stability (OS)). Based on the levels found for FA, PV and extinction coefficients (K232, K270 and K), the 43 olive oils were classified as: EVOO (4 samples), VOO (5 samples) and LOO (33 samples). It was verified that TP, DPPH and OS levels of EVOO, VOO and LOO samples were statistically similar (P-value ≥ 0.2340 for one-way ANOVA). Also, the olive cultivar (i.e., Sahli cv, Chetoui cv and other cvs) did not statistically influenced the mean levels of the FA, PV, TP, K232 and DPPH evaluated (P-value > 0.05), and slightly influenced the mean levels of K270 and OS (P-value < 0.05). Finally, as expected an almost linear tendency could be established between DPPH and OS or TP. The possibility of using the 8 physicochemical parameters for classifying olive oils according to cultivar; as well as TP, DPPH and OS for differentiating among olive oil quality levels was assessed through a fusion physicochemical data-chemometric tools approach and further evaluated using a repeated K-fold cross-validation procedure. The results from the linear discriminant analysis (LDA) coupled with a simulated annealing (SA) variable selection algorithm pointed out that the physicochemical data evaluated did not possess the aimed discrimination potential (sensitivities around 80% for cross-validation). So, for these olive oils, the identification of potential putative markers for the recognition of olive oil cultivar and quality level must be performed. Alternatively, the potential use of other analytical procedures like electrochemical analysis should be evaluated considering the satisfactory results already achieved by the research team [1].pt_PT
dc.description.sponsorshipThis work was financially supported by Project POCI-01-0145-FEDER-006984 – Associate Laboratory LSRE-LCM and by Project UID/QUI/00616/2013 – CQ-VR both funded by FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) – and by national funds through FCT - Fundação para a Ciência e a Tecnologia. Strategic funding of UID/BIO/04469/2013 unit is also acknowledged. Nuno Rodrigues thanks FCT, POPH-QREN and FSE for the Ph.D. Grant (SFRH/BD/104038/2014).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSlim, Souihli; Rodrigues, Nuno; Dias, L.G.; Veloso, Ana C.A.; Pereira, J.A.; Ouelsati, Souheib; Peres, António M. (2016). Evaluation of Tunisian olive oils from different cultivars. In Helder T. Gomes, Maria Olga A. S. Ferreira, João Barreira, Joana Amaral (Eds.) XXII Encontro Luso-Galego Química. Bragança: Instituto Politécnico. ISBN 978-989-8124-17-3pt_PT
dc.identifier.isbn978-989-8124-17-3
dc.identifier.urihttp://hdl.handle.net/10198/15831
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstituto Politécnico de Bragançapt_PT
dc.relationCharacterization of wild and ancient olive trees for its valorization”
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleEvaluation of Tunisian olive oils from different cultivarspt_PT
dc.typeconference poster
dspace.entity.typePublication
oaire.awardTitleCharacterization of wild and ancient olive trees for its valorization”
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00616%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FBIO%2F04469%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F104038%2F2014/PT
oaire.citation.conferencePlaceBragança, Portugalpt_PT
oaire.citation.endPage130pt_PT
oaire.citation.startPage130pt_PT
oaire.citation.titleXXII Encontro Luso-Galego Químicapt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameRodrigues
person.familyNameDias
person.familyNamePereira
person.familyNamePeres
person.givenNameNuno
person.givenNameLuís G.
person.givenNameJosé Alberto
person.givenNameAntónio M.
person.identifier107333
person.identifier.ciencia-idF41D-B424-5F78
person.identifier.ciencia-id2F11-9092-FAAF
person.identifier.ciencia-id611F-80B2-A7C1
person.identifier.ciencia-idCF16-5443-F420
person.identifier.orcid0000-0002-9305-0976
person.identifier.orcid0000-0002-1210-4259
person.identifier.orcid0000-0002-2260-0600
person.identifier.orcid0000-0001-6595-9165
person.identifier.ridL-6798-2014
person.identifier.ridI-8470-2012
person.identifier.scopus-author-id55258560600
person.identifier.scopus-author-id23569169900
person.identifier.scopus-author-id57204366348
person.identifier.scopus-author-id7102331969
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
relation.isAuthorOfPublication00739d63-995d-4b1f-97d0-03d24c7cf0fd
relation.isAuthorOfPublicationeac8c166-4056-4ed0-8d8d-7ecb2c4481a5
relation.isAuthorOfPublication7932162e-a2da-4913-b00d-17babbe51857
relation.isAuthorOfPublication7d93be47-8dc4-4413-9304-5b978773d3bb
relation.isAuthorOfPublication.latestForDiscoveryeac8c166-4056-4ed0-8d8d-7ecb2c4481a5
relation.isProjectOfPublicationf70c9068-bed3-4d95-b1be-9ce5d563cd22
relation.isProjectOfPublication774297b8-449c-4471-8bbb-0cfe1f4c8275
relation.isProjectOfPublicationa2fe6f7f-5a80-44cc-82a9-62cc9e25ddfa
relation.isProjectOfPublication.latestForDiscovery774297b8-449c-4471-8bbb-0cfe1f4c8275

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2016_Abstract Book_XXII Encontro Luso-Galego Química_Poster_QAMA_60.pdf
Size:
1.82 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CIMO - Posters em Encontros Científicos Internacionais