Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/17116
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dc.contributor.authorMartins, Cátiapt
dc.contributor.authorBrandão, Tiagopt
dc.contributor.authorAlmeida, Adelaidept
dc.contributor.authorRocha, Sílvia M.pt
dc.date.accessioned2017-04-03T11:10:25Z-
dc.date.issued2015-
dc.identifier.issn1615-9306pt
dc.identifier.urihttp://hdl.handle.net/10773/17116-
dc.description.abstractThe aroma profile of beer is crucial for its quality and consumer acceptance, which ismodulated by a network of variables. The main goal of this study was to optimize solid-phase microextraction experimental parameters (fiber coating, extraction temperature, and time), taking advantage of the comprehensive two-dimensional gas chromatography structured separation. As far as we know, it is the first time that this approach was used to the untargeted and comprehensive study of the beer volatile profile. Decarbonation is a critical sample preparation step, and two conditions were tested: static and under ultrasonic treatment, and the static condition was selected. Considering the conditions that promoted the highest extraction efficiency, the following parameters were selected: poly(dimethylsiloxane)/divinylbenzene fiber coating, at 40ºC, using 10 min of pre-equilibrium followed by 30 min of extraction. Around 700–800 compounds per sample were detected, corresponding to the beer volatile profile. An exploratory application was performed with commercial beers, using a set of 32 compounds with reported impact on beer aroma, in which different patterns can be observed through the structured chromatogram. In summary, the obtained results emphasize the potential of this methodology to allow an in-depth study of volatile molecular composition of beer.pt
dc.language.isoengpt
dc.publisherWileypt
dc.relationFCT - PEst-C/QUI/UI0062/2013pt
dc.relationFCT - FCOMP-01-0124-FEDER-037296pt
dc.relationFCT - PEst- C/MAR/LA0017/2013pt
dc.relationFCT - SFRH/BD/77988/2011pt
dc.rightsrestrictedAccesspor
dc.subjectBeerpt
dc.subjectSolid-phase microextractionpt
dc.subjectStructured chromatogrampt
dc.subjectTwodimensional gas chromatographypt
dc.subjectVolatile profilingpt
dc.titleInsights on beer volatile profile: optimization of solid-phase microextraction procedure taking advantage of the comprehensive two-dimensional gas chromatography structured separationpt
dc.typearticle
dc.peerreviewedyespt
ua.distributioninternationalpt
ua.event.titleJOURNAL OF SEPARATION SCIENCE
degois.publication.firstPage2140pt
degois.publication.issue12
degois.publication.issue12pt
degois.publication.lastPage2148pt
degois.publication.titleJournal of separation sciencept
degois.publication.volume38pt
dc.date.embargo10000-01-01-
dc.identifier.doi10.1002/jssc.201401388pt
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