Use of monovalent copper for sensitive detection of methyl derivatives of xanthine

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Authors

NAVRÁTIL Rudolf MOTLOVÁ Dominika JELEN František TRNKOVÁ Libuše

Year of publication 2014
Type Article in Proceedings
Conference XXXIV. Moderní Elektrochemické Metody
MU Faculty or unit

Faculty of Science

Citation
Field Physical chemistry and theoretical chemistry
Keywords Keywords Oxidation of methylxanthines; Copper complexes; Pencil graphite electrode (PeGE); Biosensing; Linear sweep voltammetry; Elimination voltammetric procedure (EVP).
Description This work is concerned with the electroanalysis of xanthine (Xan) and its methylated derivatives (1-, 3-, 7-, and 9-mXan) on a pencil graphite electrode in the presence of copper ions. The main idea of using copper consists in the in situ formation of the complex Cu(I)-mXan on the electrode surface and improvement of oxidative signals of the corresponding mXan during the detection. Linear sweep voltammetry (LSV) in connection with adsorption stripping techniques was used for the determination of mXan. To enhance the oxidation signals the elimination voltammetric procedure (EVP) was applied.
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