KFU. Card publication. Chronoamperometric evaluation of the antioxidant capacity of tea on a polyquercetin-modified electrode

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FEDERAL UNIVERSITY

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CHRONOAMPEROMETRIC EVALUATION OF THE ANTIOXIDANT CAPACITY OF TEA ON A POLYQUERCETIN-MODIFIED ELECTRODE

Form of presentation

Articles in international journals and collections

Year of publication

2017

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Ziyatdinova Guzel Kamilevna, author

Authors, postgraduates KFU

Guss Ekaterina Valerevna, postgraduate kfu

Bibliographic description in the original language

Ziyatdinova G.K. Chronoamperometric evaluation of the antioxidant capacity of tea on a polyquercetin-modified electrode / G.K. Ziyatdinova, E.V. Kozlova, H.C. Budnikov // J. Anal. Chem. - 2017. - V. 72. - � 4. - P. 382-389.

Annotation

It was established that the components of tea are oxidized on a glassy carbon electrode modified with carbon nanotubes and electropolymerized quercetin in a phosphate buffer solution (pH 7.0) as a supporting electrolyte under conditions of differential pulse voltammetry. The oxidation potentials of the individual phenolic antioxidants of tea (gallic acid, rutin, quercetin, catechin, epigallocatechin gallate, and tannin) on the modified electrode were found. A method for the chronoamperometric determination of the antioxidant capacity (AOC) of tea was developed based on the oxidation of tea antioxidants at a potential of 0.20 V. The AOC of tea was evaluated using � difference between the oxidation currents of the analyte and a supporting electrolyte after 50 s of electrolysis in terms of gallic acid. The analytical range of gallic acid was 0.25‒750 μM with a detection limit of 0.063 μM.

Keywords

�hronoamperometry, chemically modified electrodes, electropolymerized materials, antioxidant capacity, food analysis

The name of the journal

JOURNAL OF ANALYTICAL CHEMISTRY

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018463449&doi=10.1134%2fS1061934817040189&partnerID=40&md5=8b0bbd7970ddd2ba535e88cb060699f6

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

https://repository.kpfu.ru/eng/?p_id=157850&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	Guss Ekaterina Valerevna	ru_RU
dc.date.accessioned	2017-01-01T00:00:00Z	ru_RU
dc.date.available	2017-01-01T00:00:00Z	ru_RU
dc.date.issued	2017	ru_RU
dc.identifier.citation	Ziyatdinova G.K. Chronoamperometric evaluation of the antioxidant capacity of tea on a polyquercetin-modified electrode / G.K. Ziyatdinova, E.V. Kozlova, H.C. Budnikov // J. Anal. Chem. - 2017. - V. 72. - � 4. - P. 382-389.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=157850&p_lang=2	ru_RU
dc.description.abstract	JOURNAL OF ANALYTICAL CHEMISTRY	ru_RU
dc.description.abstract	It was established that the components of tea are oxidized on a glassy carbon electrode modified with carbon nanotubes and electropolymerized quercetin in a phosphate buffer solution (pH 7.0) as a supporting electrolyte under conditions of differential pulse voltammetry. The oxidation potentials of the individual phenolic antioxidants of tea (gallic acid, rutin, quercetin, catechin, epigallocatechin gallate, and tannin) on the modified electrode were found. A method for the chronoamperometric determination of the antioxidant capacity (AOC) of tea was developed based on the oxidation of tea antioxidants at a potential of 0.20 V. The AOC of tea was evaluated using � difference between the oxidation currents of the analyte and a supporting electrolyte after 50 s of electrolysis in terms of gallic acid. The analytical range of gallic acid was 0.25‒750 μM with a detection limit of 0.063 μM.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	�hronoamperometry	ru_RU
dc.subject	chemically modified electrodes	ru_RU
dc.subject	electropolymerized materials	ru_RU
dc.subject	antioxidant capacity	ru_RU
dc.subject	food analysis	ru_RU
dc.title	Chronoamperometric evaluation of the antioxidant capacity of tea on a polyquercetin-modified electrode	ru_RU
dc.type	Articles in international journals and collections	ru_RU