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Novel approach for the voltammetric evaluation of antioxidant activity using DPPH[rad]-modified electrode

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dc.contributor.author Ziyatdinova G.
dc.contributor.author Snegureva Y.
dc.contributor.author Budnikov H.
dc.date.accessioned 2018-04-05T07:08:54Z
dc.date.available 2018-04-05T07:08:54Z
dc.date.issued 2017
dc.identifier.issn 0013-4686
dc.identifier.uri http://dspace.kpfu.ru/xmlui/handle/net/129400
dc.description.abstract © 2017 Elsevier Ltd The electrochemical behavior of 2,2-diphenyl-1-picrylhydrazyl (DPPH[rad]) immobilized on the electrode surface has been studied. Bare glassy carbon electrode (GCE) and modified with dispersions of CeO 2 nanoparticles in water (CeO 2 -H 2 O/GCE) and cationic surfactant cetylpyridinium bromide medium (CeO 2 -CPB/GCE) has been investigated as a platform for the DPPH[rad] immobilization. The best voltammetric characteristics (peak potential separation of 70 mV, system reversibility with currents ratio of 0.98 and the highest peaks currents) have been observed on CeO 2 -CPB/GCE. The effect of CeO 2 nanoparticles concentration has been evaluated. Scanning electron microscopy and electrochemical impedance spectroscopy have been applied for the electrode characterization. DPPH[rad]/CeO 2 -CPB/GCE has been used for the estimation of the antioxidants activity of natural phenolic antioxidants (quercetin, tannin, catechin and ferulic acid) expressed as the EC 50 parameter according to differential pulse voltammetric (DPV) data. The EC 50 decreased in the following order: quercetin (29 ± 1 μM), tannin (29 ± 4 μM), catechin (117 ± 4 μM) and ferulic acid (731 ± 17 μM). These data are in a good agreement with the results of standard spectrophotometric determination. The developed approach has been successfully applied for the antioxidant activity evaluation of medicinal herbs tinctures, infusions and decoctions.
dc.relation.ispartofseries Electrochimica Acta
dc.subject antioxidant activity
dc.subject chemically modified electrodes
dc.subject DPPH
dc.subject phytochemical analysis
dc.subject Voltammetry
dc.title Novel approach for the voltammetric evaluation of antioxidant activity using DPPH[rad]-modified electrode
dc.type Article
dc.relation.ispartofseries-volume 247
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 97
dc.source.id SCOPUS00134686-2017-247-SID85022050582


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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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