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Composition and antioxidant activity of thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillation

2010-07Journal article Open access
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dc.contributor.authorGrosso, Clara
dc.contributor.authorFigueiredo, Ana Cristina
dc.contributor.authorBurillo, Jesus
dc.contributor.authorMainar, Ana M.
dc.contributor.authorUrieta, José S.
dc.contributor.authorBarroso, José G.
dc.contributor.authorCoelho, Jose
dc.contributor.authorPalavra, António M. F.
dc.date.accessioned2011-11-30T11:33:20Z
dc.date.available2011-11-30T11:33:20Z
dc.date.issued2010-07
dc.description.abstractSupercritical fluid extraction (SEE) of the volatile oil from Thymus vulgaris L. aerial flowering parts was performed under different conditions of pressure, temperature, mean particle size and CO2 flow rate and the correspondent yield and composition were compared with those of the essential oil isolated by hydrodistillation (HD). Both the oils were analyzed by GC and GC-MS and 52 components were identified. The main volatile components obtained were p-cymene (10.0-42.6% for SFE and 28.9-34.8% for HD), gamma-terpinene (0.8-6.9% for SFE and 5.1-7.0% for HD), linalool (2.3-5.3% for SFE and 2.8-3.1% for HD), thymol (19.5-40.8% for SFE and 35.4-41.6% for HD), and carvacrol (1.4-3.1% for SFE and 2.6-3.1% for HD). The main difference was found to be the relative percentage of thymoquinone (not found in the essential oil) and carvacryl methyl ether (1.0-1.2% for HD versus t-0.4 for SFE) which can explain the higher antioxidant activity, assessed by Rancimat test, of the SFE volatiles when compared with HD. Thymoquinone is considered a strong antioxidant compound.por
dc.identifier.citationGrosso C, Figueiredo A C, Burillo J, Mainar A M, Urieta J S, Barroso J G, Coelho J A, Palavra A M F. Composition and antioxidant activity of Thymus vulgaris volatiles: Comparison between supercritical fluid extraction and hydrodistillation.Journal of Separation Science. 2010; 33 (14): 2211-2218.por
dc.identifier.issn1615-9306
dc.identifier.urihttp://hdl.handle.net/10400.21/741
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWiley-V C H Verlag GMBHpor
dc.relation.ispartofseries14;
dc.subjectAntioxidant activitypor
dc.subjectHydrodistillationpor
dc.subjectRancimat testpor
dc.subjectSupercritical fluid extractionpor
dc.subjectThymus vulgaris L.por
dc.titleComposition and antioxidant activity of thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillationpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceWeinheimpor
oaire.citation.endPage2218por
oaire.citation.issue33por
oaire.citation.startPage2211por
oaire.citation.titleJournal of Separation Sciencepor
person.familyNameCoelho
person.givenNameJose
person.identifierR-000-84M
person.identifier.ciencia-idD716-31DF-8371
person.identifier.orcid0000-0001-8118-0864
person.identifier.ridG-2626-2011
person.identifier.scopus-author-id7101841005
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationec13b922-f442-44fa-bb07-7c2e0bebbe6d
relation.isAuthorOfPublication.latestForDiscoveryec13b922-f442-44fa-bb07-7c2e0bebbe6d

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