KFU. Card publication. Electrochemical determination of unithiol and lipoic acid at electrodes modified with carbon nanotubes

KAZAN
FEDERAL UNIVERSITY

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ELECTROCHEMICAL DETERMINATION OF UNITHIOL AND LIPOIC ACID AT ELECTRODES MODIFIED WITH CARBON NANOTUBES

Form of presentation

Articles in Russian journals and collections

Year of publication

2009

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Authors, employees of KFU

Budnikov German Konstantinovich, author

Ziyatdinova Guzel Kamilevna, author

Authors, students KFU

Grigoreva Lidiya Vladimirovna, author

Bibliographic description in the original language

Ziyatdinova, G.K. Electrochemical determination of unithiol and lipoic acid at electrodes modified with carbon nanotubes / G.K. Ziyatdinova, L.V. Grigor'eva, G.K. Budnikov // J. Anal. Chem. - 2009. - V. 64. - No. 2 - P. 185-188.

Annotation

Conditions are found for the voltammetric determination of lipoic acid and unithiol at a glassy-carbon electrode modified with multiwalled carbon nanotubes. Possible mechanisms for the oxidation of lipoic acid and unithiol are proposed. As compared to an unmodified electrode, the use of the modified electrode allows the analyst to reduce overvoltage (ΔE= 0.1 V) and increase the oxidation current of lipoic acid. Unithiol is oxidized in the accessible range of potentials only at an electrode modified with carbon nanotubes. The determination limits for unithiol and lipoic acid are 4.1×10(?5) and 1.9×10(?5) M, respectively. Milligram amounts of these substances are determined in model solutions with RSD = 1?5%. Procedures for determining the active substances (lipoic acid and unithiol) in pharmaceuticals are proposed.

Keywords

Voltammetry, chemically modified electrodes, carbon nanotubes, lipoic acid, unithiol, pharmaceutical analysis

The name of the journal

JOURNAL OF ANALYTICAL CHEMISTRY

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-59849103104&partnerID=40&md5=fbc1a5508213a66089debb9839609ac9

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

https://repository.kpfu.ru/eng/?p_id=134865&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	Grigoreva Lidiya Vladimirovna	ru_RU
dc.date.accessioned	2009-01-01T00:00:00Z	ru_RU
dc.date.available	2009-01-01T00:00:00Z	ru_RU
dc.date.issued	2009	ru_RU
dc.identifier.citation	Ziyatdinova, G.K. Electrochemical determination of unithiol and lipoic acid at electrodes modified with carbon nanotubes / G.K. Ziyatdinova, L.V. Grigor'eva, G.K. Budnikov // J. Anal. Chem. - 2009. - V. 64. - No. 2 - P. 185-188.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=134865&p_lang=2	ru_RU
dc.description.abstract	JOURNAL OF ANALYTICAL CHEMISTRY	ru_RU
dc.description.abstract	Conditions are found for the voltammetric determination of lipoic acid and unithiol at a glassy-carbon electrode modified with multiwalled carbon nanotubes. Possible mechanisms for the oxidation of lipoic acid and unithiol are proposed. As compared to an unmodified electrode, the use of the modified electrode allows the analyst to reduce overvoltage (ΔE= 0.1 V) and increase the oxidation current of lipoic acid. Unithiol is oxidized in the accessible range of potentials only at an electrode modified with carbon nanotubes. The determination limits for unithiol and lipoic acid are 4.1×10(?5) and 1.9×10(?5) M, respectively. Milligram amounts of these substances are determined in model solutions with RSD = 1?5%. Procedures for determining the active substances (lipoic acid and unithiol) in pharmaceuticals are proposed.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Voltammetry	ru_RU
dc.subject	chemically modified electrodes	ru_RU
dc.subject	carbon nanotubes	ru_RU
dc.subject	lipoic acid	ru_RU
dc.subject	unithiol	ru_RU
dc.subject	pharmaceutical analysis	ru_RU
dc.title	Electrochemical determination of unithiol and lipoic acid at electrodes modified with carbon nanotubes	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU