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MWNT-Based Electrode for the Voltammetric Quantification of Carvacrol

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dc.contributor.author Ziyatdinova G.
dc.contributor.author Budnikov H.
dc.date.accessioned 2022-02-09T20:42:47Z
dc.date.available 2022-02-09T20:42:47Z
dc.date.issued 2021
dc.identifier.issn 1936-9751
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/169749
dc.description.abstract Glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWNTs) dispersed in anionic surfactant sodium dodecylsulfate (MWNTs/GCE) has been developed for the carvacrol quantification. The electrode modification provides electrocatalytic effect to carvacrol oxidation (the cathodic shift of the oxidation potential on 121 mV and 1.7-fold increase of the oxidation currents vs. GCE). The electrodes are characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The 8.4-fold higher effective surface area has been obtained for the modified electrode (75 ± 2 mm2 for MWNTs/GCE vs. 8.9 ± 0.2 mm2 for GCE). EIS data have shown 6-fold lower charge transfer resistance in comparison to GCE. The irreversible diffusion-controlled oxidation of carvacrol with participation of one electron and one proton has been proved. The parameters of electrooxidation have been calculated. Differential pulse voltammetric quantification in phosphate buffer pH 6.5 can be performed in the ranges of 0.1–25 and 25–150 μM of carvacrol. The detection limit of 0.075 μM has been achieved. The method developed has been successfully applied for the determination of total isopropylmethylphenols in oregano spices. The results obtained have been compared to independent spectrophotometric method data. [Figure not available: see fulltext.]
dc.relation.ispartofseries Food Analytical Methods
dc.subject Carbon nanotubes
dc.subject Carvacrol
dc.subject Food analysis
dc.subject Isopropylmethylphenols
dc.subject Modified electrodes
dc.subject Oregano
dc.subject Voltammetry
dc.title MWNT-Based Electrode for the Voltammetric Quantification of Carvacrol
dc.type Article
dc.relation.ispartofseries-issue 2
dc.relation.ispartofseries-volume 14
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 401
dc.source.id SCOPUS19369751-2021-14-2-SID85092788619


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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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