KFU. Card publication. Voltammetric determination of quercetin and rutin in their simultaneous presence on an electrode modified with polythymolphthalein

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VOLTAMMETRIC DETERMINATION OF QUERCETIN AND RUTIN IN THEIR SIMULTANEOUS PRESENCE ON AN ELECTRODE MODIFIED WITH POLYTHYMOLPHTHALEIN

Form of presentation

Articles in international journals and collections

Year of publication

2020

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Guss Ekaterina Valerevna, author

Ziyatdinova Guzel Kamilevna, author

Authors, postgraduates KFU

Zhupanova Anastasiya Sergeevna, postgraduate kfu

Bibliographic description in the original language

Guss, E.V. Voltammetric determination of quercetin and rutin in their simultaneous presence on an electrode modified with polythymolphthalein / E.V. Guss, G.K. Ziyatdinova, A.S. Zhupanova, H.C. Budnikov // J. Anal. Chem. - 2020. - V. 75. - � 4. - P. 526-535.

Annotation

A voltammetric method is developed for the determination of quercetin and rutin in the simultaneous presence on a glassy carbon electrode modified with carbon nanofibers and polythymolphthalein. The conditions of the potentiodynamic electrolysis of thymolphthalein providing the maximum difference in the oxidation potentials of quercetin and rutin equal to 136 mV are found. Thymolphthalein electropolymerization should be carried out in a 100 μM solution by the 10-fold cycling of the potential from 0 to 1.7 V at a sweep rate of 75 mV/s in phosphate buffer solution with pH 7.0. The electrode modified with polythymolphthalein is characterized by scanning electron microscopy, cyclic voltammetry, and electrochemical impedance. It is found that the oxidation of quercetin proceeds irreversibly, and that of rutin, quasi-reversibly with the participation of two electrons and two protons and is controlled by the adsorption of analytes on the electrode surface. The analytical range is 0.025?1.00 μM for both analytes, and the limits of detection are 7.3 nM for quercetin and 4.7 nM for rutin. The selectivity of the electrode response to quercetin and rutin in the presence of inorganic ions, saccharides, and ascorbic and p-coumaric acids is shown. The developed method is tested on real samples (linden Tilia L. flowers and onions).

Keywords

Voltammetry, chemically modified electrodes, electropolymerization, determination of structurally related compounds, quercetin, rutin

The name of the journal

JOURNAL OF ANALYTICAL CHEMISTRY

URL

https://www.scopus.com/record/display.uri?eid=2-s2.0-85080025223&origin=resultslist&sort=plf-f&src=s&sid=64312f9c0837fbccada40d9dc446f33e&sot=autdocs&sdt=autdocs&sl=17&s=AU-ID%286602647537%29&relpos=1&citeCnt=1&searchTerm=

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

https://repository.kpfu.ru/eng/?p_id=232631&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Budnikov German Konstantinovich	ru_RU
dc.contributor.author	Guss Ekaterina Valerevna	ru_RU
dc.contributor.author	Ziyatdinova Guzel Kamilevna	ru_RU
dc.contributor.author	Zhupanova Anastasiya Sergeevna	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Guss, E.V. Voltammetric determination of quercetin and rutin in their simultaneous presence on an electrode modified with polythymolphthalein / E.V. Guss, G.K. Ziyatdinova, A.S. Zhupanova, H.C. Budnikov // J. Anal. Chem. - 2020. - V. 75. - � 4. - P. 526-535.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=232631&p_lang=2	ru_RU
dc.description.abstract	JOURNAL OF ANALYTICAL CHEMISTRY	ru_RU
dc.description.abstract	A voltammetric method is developed for the determination of quercetin and rutin in the simultaneous presence on a glassy carbon electrode modified with carbon nanofibers and polythymolphthalein. The conditions of the potentiodynamic electrolysis of thymolphthalein providing the maximum difference in the oxidation potentials of quercetin and rutin equal to 136 mV are found. Thymolphthalein electropolymerization should be carried out in a 100 μM solution by the 10-fold cycling of the potential from 0 to 1.7 V at a sweep rate of 75 mV/s in phosphate buffer solution with pH 7.0. The electrode modified with polythymolphthalein is characterized by scanning electron microscopy, cyclic voltammetry, and electrochemical impedance. It is found that the oxidation of quercetin proceeds irreversibly, and that of rutin, quasi-reversibly with the participation of two electrons and two protons and is controlled by the adsorption of analytes on the electrode surface. The analytical range is 0.025?1.00 μM for both analytes, and the limits of detection are 7.3 nM for quercetin and 4.7 nM for rutin. The selectivity of the electrode response to quercetin and rutin in the presence of inorganic ions, saccharides, and ascorbic and p-coumaric acids is shown. The developed method is tested on real samples (linden Tilia L. flowers and onions).	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Voltammetry	ru_RU
dc.subject	chemically modified electrodes	ru_RU
dc.subject	electropolymerization	ru_RU
dc.subject	determination of structurally related compounds	ru_RU
dc.subject	quercetin	ru_RU
dc.subject	rutin	ru_RU
dc.title	Voltammetric determination of quercetin and rutin in their simultaneous presence on an electrode modified with polythymolphthalein	ru_RU
dc.type	Articles in international journals and collections	ru_RU