KFU. Card publication. Chronocoulometric method for the evaluation of antioxidant capacity of medicinal plant tinctures

KAZAN
FEDERAL UNIVERSITY

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CHRONOCOULOMETRIC METHOD FOR THE EVALUATION OF ANTIOXIDANT CAPACITY OF MEDICINAL PLANT TINCTURES

Form of presentation

Articles in international journals and collections

Year of publication

2018

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Guss Ekaterina Valerevna, author

Ziyatdinova Guzel Kamilevna, author

Authors, postgraduates KFU

Guss Ekaterina Valerevna, postgraduate kfu

Authors, students KFU

Morozova Evgeniya Vasilevna, author

Bibliographic description in the original language

Ziyatdinova, G. Chronocoulometric method for the evaluation of antioxidant capacity of medicinal plant tinctures / G. Ziyatdinova, E. Kozlova, E. Morozova, H. Budnikov // Analytical Methods. - 2018. - V. 10. - � 41. - P. 4995-5003.

Annotation

The oxidation potentials of medicinal plant tinctures have been studied on glassy carbon electrode, modified layer-by-layer with multi-walled carbon nanotubes and poly(gallic acid) (PGA/MWNT/GCE) in phosphate buffer solution of pH 7.4. PGA-modified electrode has shown significantly higher sensitivity towards antioxidants in tinctures in comparison to bare GCE and MWNT/GCE. A novel approach for the evaluation of antioxidant capacity of medicinal plant tinctures using one-step chronocoulometry at 1.0 V has been developed. A steady state is achieved at 100 s of electrolysis. The antioxidant capacity has been expressed in quercetin equivalents per 1 mL of tincture. Linear dynamic ranges of 0.010?0.25 and 0.25?250 μmol L−1 quercetin with the limits of detection and determination of 2.9 and 9.8 nmol L−1, respectively, have been obtained. Eleven medicinal plant tinctures have been investigated.

Keywords

Chronocuolometry, chemically modified electrodes, poly(gallic acid), antioxidant capacity, medicinal plants

The name of the journal

Analytical Methods

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85055631906&doi=10.1039%2fc8ay01907j&partnerID=40&md5=3dc63c5f08a622780420c1d641e73b60

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

https://repository.kpfu.ru/eng/?p_id=189735&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	Morozova Evgeniya Vasilevna	ru_RU
dc.contributor.author	Guss Ekaterina Valerevna	ru_RU
dc.date.accessioned	2018-01-01T00:00:00Z	ru_RU
dc.date.available	2018-01-01T00:00:00Z	ru_RU
dc.date.issued	2018	ru_RU
dc.identifier.citation	Ziyatdinova, G. Chronocoulometric method for the evaluation of antioxidant capacity of medicinal plant tinctures / G. Ziyatdinova, E. Kozlova, E. Morozova, H. Budnikov // Analytical Methods. - 2018. - V. 10. - � 41. - P. 4995-5003.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=189735&p_lang=2	ru_RU
dc.description.abstract	Analytical Methods	ru_RU
dc.description.abstract	The oxidation potentials of medicinal plant tinctures have been studied on glassy carbon electrode, modified layer-by-layer with multi-walled carbon nanotubes and poly(gallic acid) (PGA/MWNT/GCE) in phosphate buffer solution of pH 7.4. PGA-modified electrode has shown significantly higher sensitivity towards antioxidants in tinctures in comparison to bare GCE and MWNT/GCE. A novel approach for the evaluation of antioxidant capacity of medicinal plant tinctures using one-step chronocoulometry at 1.0 V has been developed. A steady state is achieved at 100 s of electrolysis. The antioxidant capacity has been expressed in quercetin equivalents per 1 mL of tincture. Linear dynamic ranges of 0.010?0.25 and 0.25?250 μmol L−1 quercetin with the limits of detection and determination of 2.9 and 9.8 nmol L−1, respectively, have been obtained. Eleven medicinal plant tinctures have been investigated.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Chronocuolometry	ru_RU
dc.subject	chemically modified electrodes	ru_RU
dc.subject	poly(gallic acid)	ru_RU
dc.subject	antioxidant capacity	ru_RU
dc.subject	medicinal plants	ru_RU
dc.title	Chronocoulometric method for the evaluation of antioxidant capacity of medicinal plant tinctures	ru_RU
dc.type	Articles in international journals and collections	ru_RU