КФУ. Карточка публикации. Chronoamperometric evaluation of the antioxidant capacity of tea on a polyquercetin-modified electrode

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

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2017

Язык

английский

Авторы, сотрудники КФУ

Будников Герман Константинович, автор

Зиятдинова Гузель Камилевна, автор

Авторы, аспиранты КФУ

Гусс Екатерина Валерьевна, автор

Библиографическое описание на языке оригинала

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.

Аннотация

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 а 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.

Ключевые слова

Сhronoamperometry, chemically modified electrodes, electropolymerized materials, antioxidant capacity, food analysis

Название журнала

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

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https://repository.kpfu.ru/?p_id=157850

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Будников Герман Константинович	ru_RU
dc.contributor.author	Зиятдинова Гузель Камилевна	ru_RU
dc.contributor.author	Гусс Екатерина Валерьевна	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/?p_id=157850	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 а 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	Сhronoamperometry	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	Статьи в зарубежных журналах и сборниках	ru_RU