KFU. Card publication. MWNT-modified electrodes for voltammetric determination of lipophilic vitamins

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FEDERAL UNIVERSITY

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MWNT-MODIFIED ELECTRODES FOR VOLTAMMETRIC DETERMINATION OF LIPOPHILIC VITAMINS

Form of presentation

Articles in international journals and collections

Year of publication

2012

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Ziyatdinova Guzel Kamilevna, author

Bibliographic description in the original language

Ziyatdinova, G. MWNT-modified electrodes for voltammetric determination of lipophilic vitamins / G. Ziyatdinova, H. Budnikov // J. Solid State Electrochem. - 2012. - V. 16. - No. 7. - P. 2441-2447.

Annotation

Multi-walled carbon nanotube modified graphite electrodes (MWNT-GEs) have been created for the voltammetric determination of α-tocopherol and retinol. The electrode surface was characterized by atomic force microscopy. The MWNT-GEs presented structured surfaces and a significant (26-fold) increase in roughness over unmodified graphite electrodes (8.2 vs. 0.32 nm for MWNT-GEs and GEs, respectively). Their surfaces consisted of aggregates with a highly regular ?thorn-like? structure. α-Tocopherol and retinol were oxidized on the bare GEs and the MWNT-GEs in 0.1 M HClO4 in acetonitrile. Decreases in the overpotential of 0.2 and 0.04 V for α-tocopherol and retinol, respectively, and increased oxidation currents were observed on the MWNT-GEs in comparison with the unmodified electrodes. The calibration graphs were linear in the range 0.065?2.00 mM for α-tocopherol and 0.05?1.50 mM for retinol. The detection limits were found to be 0.05 and 0.04 mM for α-tocopherol and retinol, respectively.

Keywords

Carbon nanotubes, chemically modified electrodes, voltammetry, retinol, α-tocopherol, pharmaceutical analysis

The name of the journal

Journal of Solid State Electrochemistry

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84864556799&partnerID=40&md5=65de94927836834dfb25a9e1c90b1214

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

https://repository.kpfu.ru/eng/?p_id=134853&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.date.accessioned	2012-01-01T00:00:00Z	ru_RU
dc.date.available	2012-01-01T00:00:00Z	ru_RU
dc.date.issued	2012	ru_RU
dc.identifier.citation	Ziyatdinova, G. MWNT-modified electrodes for voltammetric determination of lipophilic vitamins / G. Ziyatdinova, H. Budnikov // J. Solid State Electrochem. - 2012. - V. 16. - No. 7. - P. 2441-2447.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=134853&p_lang=2	ru_RU
dc.description.abstract	Journal of Solid State Electrochemistry	ru_RU
dc.description.abstract	Multi-walled carbon nanotube modified graphite electrodes (MWNT-GEs) have been created for the voltammetric determination of α-tocopherol and retinol. The electrode surface was characterized by atomic force microscopy. The MWNT-GEs presented structured surfaces and a significant (26-fold) increase in roughness over unmodified graphite electrodes (8.2 vs. 0.32 nm for MWNT-GEs and GEs, respectively). Their surfaces consisted of aggregates with a highly regular ?thorn-like? structure. α-Tocopherol and retinol were oxidized on the bare GEs and the MWNT-GEs in 0.1 M HClO4 in acetonitrile. Decreases in the overpotential of 0.2 and 0.04 V for α-tocopherol and retinol, respectively, and increased oxidation currents were observed on the MWNT-GEs in comparison with the unmodified electrodes. The calibration graphs were linear in the range 0.065?2.00 mM for α-tocopherol and 0.05?1.50 mM for retinol. The detection limits were found to be 0.05 and 0.04 mM for α-tocopherol and retinol, respectively.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Carbon nanotubes	ru_RU
dc.subject	chemically modified electrodes	ru_RU
dc.subject	voltammetry	ru_RU
dc.subject	retinol	ru_RU
dc.subject	α-tocopherol	ru_RU
dc.subject	pharmaceutical analysis	ru_RU
dc.title	MWNT-modified electrodes for voltammetric determination of lipophilic vitamins	ru_RU
dc.type	Articles in international journals and collections	ru_RU