Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/27131
DC FieldValueLanguage
dc.contributor.authorTorres, A. Carolina-
dc.contributor.authorBarsan, Madalina M.-
dc.contributor.authorBrett, Christopher M. A.-
dc.date.accessioned2014-09-30T13:31:57Z-
dc.date.available2014-09-30T13:31:57Z-
dc.date.issued2014-04-15-
dc.identifier.citationTORRES, A. Carolina; BARSAN, Madalina M.; BRETT, Christopher M. A. - Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes. "Food Chemistry". ISSN 0308-8146. Vol. 149 (2014) p. 215-220por
dc.identifier.issn0308-8146-
dc.identifier.urihttp://hdl.handle.net/10316/27131-
dc.description.abstractA simple, economic, highly sensitive and highly selective method for the detection of caffeine has been developed at bare and Nafion-modified glassy carbon electrodes (GCE). The electrochemical behaviour of caffeine was examined in electrolyte solutions of phosphate buffer saline, sodium perchlorate, and in choline chloride plus oxalic acid, using analytical determinations by fixed potential amperometry, phosphate buffer saline being the best. Modifications of the GCE surface with poly(3,4-ethylenedioxythiophene) (PEDOT), Nafion, and multi-walled carbon nanotubes were tested in order to evaluate possible sensor performance enhancements, Nafion giving the most satisfactory results. The effect of interfering compounds usually found in samples containing caffeine was examined at GCE without and with Nafion coating, to exclude interferences, and the sensors were successfully applied to determine the caffeine content in commercial beverages and drugs.por
dc.language.isoengpor
dc.publisherElsevierpor
dc.rightsopenAccesspor
dc.subjectCaffeinepor
dc.subjectGlassy carbonpor
dc.subjectNafion coatingpor
dc.subjectModified electrodespor
dc.subjectFood analysispor
dc.titleSimple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodespor
dc.typearticlepor
degois.publication.firstPage215por
degois.publication.lastPage220por
degois.publication.titleFood Chemistrypor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S030881461301563Xpor
dc.peerreviewedYespor
dc.identifier.doi10.1016/j.foodchem.2013.10.114-
degois.publication.volume149por
item.fulltextCom Texto completo-
item.languageiso639-1en-
item.grantfulltextopen-
crisitem.author.researchunitCentre for Mechanical Engineering-
crisitem.author.orcid0000-0002-8492-5558-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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