Pencil Graphite Electrodes as a Tool for Analysis of Xanthine and 8-Methylxanthine

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Authors

NAVRÁTIL Rudolf JELEN František TRNKOVÁ Libuše

Year of publication 2013
Type Article in Proceedings
Conference XXXIII. Moderní elektrochemické metody, sborník přednášek
MU Faculty or unit

Faculty of Science

Citation
Field Electrochemistry
Keywords Xanthine (Xan);8-methylxanthine (8-mXan);pencil graphite electrode (PeGE);linear sweep voltammetry (LSV);elimination voltammetry with linear scan (EVLS);SEM;EDX
Description Electrochemical behavior of xanthine (Xan) and 8-methylxanthine (8-mXan) on a pencil graphite electrode (PeGE) in the presence of copper ions is reported. For this purpose we used linear sweep voltammetry (LSV) in combination with adsorptive stripping (AdS) technique and the elimination (EVLS) procedure. The sensitive detection of purine oxidation signals was performed depending on scan rate, pH, concentration of Cu(II), and modification of PeGE surface. To achieve the best electroanalytical determination of Xan and 8-mXan the optimal experimental conditions were chosen, and to understand the electrode processes of both xanthines on Cu(I)-modified PeGE spectral and microscopic methods were used.
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