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Label-free electrochemical analysis of purine nucleotides and nucleobases at disposable carbon electrodes in microliter volumes

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    0518362 - BFÚ 2020 RIV CH eng J - Journal Article
    Hasoň, Stanislav - Fojta, Miroslav - Ostatná, Veronika
    Label-free electrochemical analysis of purine nucleotides and nucleobases at disposable carbon electrodes in microliter volumes.
    Journal of Electroanalytical Chemistry. Roč. 847, AUG 15 2019 (2019), č. článku 113252. ISSN 1572-6657
    R&D Projects: GA ČR(CZ) GA17-08971S; GA MŠk EF15_003/0000477
    Institutional support: RVO:68081707
    Keywords : dna bases * pencil electrodes * graphene * graphite
    Subject RIV: CG - Electrochemistry
    OBOR OECD: Analytical chemistry
    Impact factor: 3.807, year: 2019
    https://www.sciencedirect.com/science/article/pii/S157266571930520X?via%3Dihub

    We analyzed purine nucleotides in oligodeoxynucleotides (ODN) and nucleobase residues acid-hydrolyzed ODN at nanomolar concentrations in few tens of microliters of solution at commercially available unmodified graphite pencil electrodes, screen printed graphite electrodes (SPGEs) and SPGEs modified by graphene, single- and multi-walled carbon nanotubes. Our results suggest that specific properties of different graphite-based electrodes have significant impact on ODN analysis. Nanostructure-modified electrodes produced higher signals due to purine nucleobase oxidation but also higher background currents. The unmodified disposable carbon electrodes allowed analysis of both free nucleobases and ODNs. Our results show that unmodified SPGEs represent a good compromise for signal/noise ratio. Electrooxidation of purines at these electrodes was only little affected by the presence of pyrimidines in contrast to the pencil graphite electrode.
    Permanent Link: http://hdl.handle.net/11104/0303516
     
Number of the records: 1