Kazan (Volga region) Federal University, KFU
KAZAN
FEDERAL UNIVERSITY
 
ELECTROCHEMICAL DETERMINATION OF UNITHIOL AND LIPOIC ACID AT ELECTRODES MODIFIED WITH CARBON NANOTUBES
Form of presentationArticles in Russian journals and collections
Year of publication2009
Языканглийский
  • Budnikov German Konstantinovich, author
  • Ziyatdinova Guzel Kamilevna, author
  • 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

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