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dc.contributor.authorRodríguez Méndez, María Luz 
dc.contributor.authorMatemodombo, Fungisai
dc.contributor.authorApetrei, Constantin
dc.contributor.authorNyokong, Tebello
dc.contributor.authorSaja Sáez, José Antonio de
dc.date.accessioned2018-07-16T08:35:39Z
dc.date.issued2012
dc.identifier.citationSensors and Actuators B vol. 166-167 p. 457-466es
dc.identifier.issn0925-4005es
dc.identifier.urihttp://uvadoc.uva.es/handle/10324/30705
dc.descriptionProducción Científicaes
dc.description.abstractCobalt phthalocyanine (CoPc) and cobalt phthalocyanine carboxylic derivatives (CoTCPc and CoOCPc) have been used as electrocatalysts for the detection of the antioxidants vanillic acid, caffeic acid, pyrogallol, and ascorbic acid on screen-printed carbon and disk electrode surfaces. The cobalt phthalocyanines were used to detect vanillic acid (with limit of detection ranging from 1.15 μM to 2.42 μM at potentials of 0.55–0.88 V vs. Ag|AgCl), caffeic acid (with limit of detection ranging from 1.17 μM to 2.20 μM at potentials of 0.30–0.81 V vs. Ag|AgCl), pyrogallol (with limit of detection ranging from 1.16 μM to 3.63 μM at potentials of 0.52–0.63 V vs. Ag|AgCl), and ascorbic acid (with limit of detection ranging from 1.16 μM to 1.58 μM at potentials of 0.34–0.46 V vs. Ag|AgCl). The kinetic studies also demonstrate diffusion-controlled processes at the electrode surface. The SPCE electrodes have better detection properties towards vanillic acid, caffeic acid, pyrogallol while the disk electrodes had better ascorbic acid detection properties as proven by kinetic studies. Both types CoPc-influenced electrodes show 100% discrimination of the antioxidants.es
dc.format.mimetypeapplication/pdfes
dc.language.isoenges
dc.rights.accessRightsinfo:eu-repo/semantics/embargoedAccesses
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleComparison of carbon screen printed and disk electrodes in the detection of antioxidants using CoPc derivativeses
dc.typeinfo:eu-repo/semantics/articlees
dc.identifier.doi10.1016/j.snb.2012.02.088es
dc.peerreviewedSIes
dc.description.embargo2022-07-6es
dc.description.lift2022-07-06
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International


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