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dc.creatorĐurđić, Slađana
dc.creatorStanković, V.
dc.creatorVlahović, Filip
dc.creatorOgnjanović, Miloš
dc.creatorKalcher, Kurt
dc.creatorĆirković Veličković, T.
dc.creatorMutić, Jelena J.
dc.creatorStanković, Dalibor M.
dc.date.accessioned2021-04-28T13:33:59Z
dc.date.available2021-04-28T13:33:59Z
dc.date.issued2021
dc.identifier.issn0013-4651
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/4523
dc.description.abstractBased on graphene nanoplatelets capability to build block composites, as well as well-known electrochemical characteristic of the manganese oxide materials, in the present research, a nanocomposite, formed from graphene nanoplatelets (GNP) and manganese(IV)-oxide (MnO2) nanoparticles, has been proposed as a novel and convenient support for enzyme immobilization. Performance of screen printed carbon electrodes (SPCEs) was significantly improved after their modification with GNP@MnO2 (SPCE/GNP@MnO2). The polyphenolic index biosensor was prepared by applying the drop coating technique using laccase and Nafion®. Developed biosensor shows a fast and reliable amperometric response toward caffeic acid, as a model compound, at operating potential of +0.40 V (vs Ag/AgCl), with a wide linear range and detection limit of 1.9 μmol l-1. Developed procedure was successfully applied for the determination of polyphenolic indexes in wine samples. Recovery tests indicate excellent accuracy and precision of the method, concluding that the biosensor can offer a fast, accurate, reliable and precise determination of the polyphenolic index. More importantly, our results suggest a great potential for the application in real samples. © 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.sr
dc.language.isoensr
dc.publisherThe Electrochemical Society ("ECS").sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200168/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//sr
dc.relationCEEPUS network CIII-CZ-0212-13-1920-M-131892 (Education of Modern Analytical and Bioanalytical Methods)sr
dc.relationEureka project call, E! 13303 MED-BIO-TESTsr
dc.relation.isversionofhttps://cer.ihtm.bg.ac.rs/handle/123456789/4578
dc.rightsrestrictedAccesssr
dc.sourceJournal of Electrochemical Societysr
dc.subjectBiosensorssr
dc.subjectElectrodessr
dc.subjectEnzyme immobilizationsr
dc.subjectGraphenesr
dc.subjectGraphene Nanoplateletssr
dc.subjectAccuracy and precisionsr
dc.subjectAmperometric responsesr
dc.subjectAnalytical applicationssr
dc.subjectDetection limitssr
dc.subjectElectrochemical characteristicssr
dc.subjectPrecise determinationssr
dc.subjectScreen printed carbon electrode (SPCEs)sr
dc.subjectWide-linear rangesr
dc.subjectManganese oxidesr
dc.titleLaccase Polyphenolic Biosensor Supported on MnO2@GNP Decorated SPCE: Preparation, Characterization, and Analytical Applicationsr
dc.typearticlesr
dc.rights.licenseARRsr
dcterms.abstractЋирковић Величковић, Т.; Мутић, Јелена Ј.; Станковић, Далибор М.; Калцхер, Курт; Огњановић, Милош; Влаховић, Филип; Станковић, В.; Ђурђић, Слађана;
dc.citation.volume168
dc.citation.issue3
dc.citation.spage037510
dc.citation.rankM21~
dc.description.otherThe peer-review version: [https://cer.ihtm.bg.ac.rs/handle/123456789/4578]
dc.identifier.doi10.1149/1945-7111/abeaf2
dc.identifier.scopus2-s2.0-8510323562
dc.type.versionpublishedVersionsr


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