KFU. Card publication. Voltammetric evaluation of the antioxidant capacity of tea on electrodes modified with multiwalled carbon nanotubes

KAZAN
FEDERAL UNIVERSITY

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VOLTAMMETRIC EVALUATION OF THE ANTIOXIDANT CAPACITY OF TEA ON ELECTRODES MODIFIED WITH MULTIWALLED CARBON NANOTUBES

Form of presentation

Articles in Russian journals and collections

Year of publication

2013

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Ziyatdinova Guzel Kamilevna, author

Authors, postgraduates KFU

Nizamova Alfiya Maratovna, postgraduate kfu

Authors, students KFU

Aytuganova Ilmira Ilnurovna, author

Bibliographic description in the original language

Ziyatdinova, G.K. Voltammetric evaluation of the antioxidant capacity of tea on electrodes modified with multiwalled carbon nanotubes / G.K. Ziyatdinova, A.M. Nizamova, I.I. Aytuganova, H.C. Budnikov // J. Anal. Chem. - 2013. - V. 68. - No. 2. - P. 132-139.

Annotation

The characteristics of the voltammograms of tea polyphenols on a glassy carbon electrode modified with multi-walled carbon nanotubes (MCNT-GCE) were evaluated. With the use of atomic force microscopy, it was found that MCNTs are oriented as rows 0.8?1.0 μm wide with alternating hills to 586 nm in height. Polyphenols other than of tannin are reversibly oxidized at the first step. Corresponding electrode reaction schemes are proposed. A voltammetric procedure for the estimation of the antioxidant capacity (AOC) of tea based on the oxidation of its polyphenol compounds was developed. The voltammograms of tea exhibited clearly defined peaks and oxidation steps whose potentials depend on the type of tea. The area of oxidation peaks was chosen as the parameter that characterizes antioxidant properties. The AOC of tea was expressed in terms of catechin equivalents per 100 mL of a beverage. 27 tea samples were analyzed.

Keywords

Cyclic voltammetry, modified electrodes, carbon nanotubes, polyphenols, antioxidant capacity, tea, food analysis

The name of the journal

JOURNAL OF ANALYTICAL CHEMISTRY

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887319789&partnerID=40&md5=48b9c57c380212d1585b1153d3ff5c2f

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=134849&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Budnikov German Konstantinovich	ru_RU
dc.contributor.author	Ziyatdinova Guzel Kamilevna	ru_RU
dc.contributor.author	Aytuganova Ilmira Ilnurovna	ru_RU
dc.contributor.author	Nizamova Alfiya Maratovna	ru_RU
dc.date.accessioned	2013-01-01T00:00:00Z	ru_RU
dc.date.available	2013-01-01T00:00:00Z	ru_RU
dc.date.issued	2013	ru_RU
dc.identifier.citation	Ziyatdinova, G.K. Voltammetric evaluation of the antioxidant capacity of tea on electrodes modified with multiwalled carbon nanotubes / G.K. Ziyatdinova, A.M. Nizamova, I.I. Aytuganova, H.C. Budnikov // J. Anal. Chem. - 2013. - V. 68. - No. 2. - P. 132-139.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=134849&p_lang=2	ru_RU
dc.description.abstract	JOURNAL OF ANALYTICAL CHEMISTRY	ru_RU
dc.description.abstract	The characteristics of the voltammograms of tea polyphenols on a glassy carbon electrode modified with multi-walled carbon nanotubes (MCNT-GCE) were evaluated. With the use of atomic force microscopy, it was found that MCNTs are oriented as rows 0.8?1.0 μm wide with alternating hills to 586 nm in height. Polyphenols other than of tannin are reversibly oxidized at the first step. Corresponding electrode reaction schemes are proposed. A voltammetric procedure for the estimation of the antioxidant capacity (AOC) of tea based on the oxidation of its polyphenol compounds was developed. The voltammograms of tea exhibited clearly defined peaks and oxidation steps whose potentials depend on the type of tea. The area of oxidation peaks was chosen as the parameter that characterizes antioxidant properties. The AOC of tea was expressed in terms of catechin equivalents per 100 mL of a beverage. 27 tea samples were analyzed.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Cyclic voltammetry	ru_RU
dc.subject	modified electrodes	ru_RU
dc.subject	carbon nanotubes	ru_RU
dc.subject	polyphenols	ru_RU
dc.subject	antioxidant capacity	ru_RU
dc.subject	tea	ru_RU
dc.subject	food analysis	ru_RU
dc.title	Voltammetric evaluation of the antioxidant capacity of tea on electrodes modified with multiwalled carbon nanotubes	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU