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Discrimination of Tea by the Electrochemical Determination of its Antioxidant Properties by a Polyaniline–DNA–Polyphenazine Dye Modified Glassy Carbon Electrode

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dc.contributor.author Kulikova T.
dc.contributor.author Porfireva A.
dc.contributor.author Vorobev V.
dc.contributor.author Saveliev A.
dc.contributor.author Ziyatdinova G.
dc.contributor.author Evtugyn G.
dc.date.accessioned 2020-01-15T20:52:09Z
dc.date.available 2020-01-15T20:52:09Z
dc.date.issued 2019
dc.identifier.issn 0003-2719
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/155453
dc.description.abstract © 2019, © 2019 Taylor & Francis Group, LLC. Voltammetric sensors have been developed on the bases of polyaniline and polymeric forms of methylene blue, methylene green, and neutral red obtained by multiple cycling of the potential. The integrity of the layers and expansion of the pH range of redox activity have been achieved by intermediate adsorption of native DNA that stabilized the oxidized polyaniline form. The formation of the coating layer was confirmed by electrochemical impedance spectroscopy and scanning electron microscopy. Model oxidants (ascorbic acid, hydroquinone, and quercetin) in the concentration range from 1 × 10−6 to 1 × 10−3 mol L−1 influenced the measured redox peaks of polymeric dyes with standard deviations from 2.4 to 5.5%. The peak currents were used for classification of tea brands using principal component analysis and linear discrimination analysis. The average discrimination of the tea brands purchased on local market was approximately 100%. The assessment of antioxidant properties of tea infusions was in agreement with results obtained using a coulometric bromine titration.
dc.relation.ispartofseries Analytical Letters
dc.subject Antioxidant assessment
dc.subject electropolymerization
dc.subject polyaniline
dc.subject polyphenothiazine dyes
dc.subject tea brand discrimination
dc.subject voltammetric sensor
dc.title Discrimination of Tea by the Electrochemical Determination of its Antioxidant Properties by a Polyaniline–DNA–Polyphenazine Dye Modified Glassy Carbon Electrode
dc.type Article
dc.relation.ispartofseries-issue 16
dc.relation.ispartofseries-volume 52
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 2562
dc.source.id SCOPUS00032719-2019-52-16-SID85067424062


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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