Electrochemical oxidation of paracetamol mediated by MgB2 microparticles modified glassy carbon electrode

Mohammed Zidan, Tan Wee Tee, A. Halim Abdullah, Zulkarnain Zainal, Goh Joo Kheng

    Research output: Contribution to journalArticleResearchpeer-review

    8 Citations (Scopus)

    Abstract

    A MgB2 microparticles modified glassy carbon electrode (MgB 2/GCE) was fabricated by adhering microparticles of MgB2 onto the electrode surface of GCE. It was used as a working electrode for the detection of paracetamol in 0.1 M KH2PO4 aqueous solution during cyclic voltammetry. Use of the MgB2/GCE the oxidation process of paracetamol with a current enhancement significantly by about 2.1 times. The detection limit of this modified electrode was found to be 30 μM. The sensitivity under conditions of cyclic voltammetry is significantly dependent on pH, supporting electrolyte, temperature and scan rate. The current enhancement observed in different electrolytic media varied in the following order: KH 2PO4 > KCl > K2SO4 7gt; KBr. Interestingly, the oxidation of paracetamol using modified GC electrode remain constant even after 15 cycling. It is therefore evident that the MgB2 modified GC electrode possesses some degree of stability. A slope of 0.52 dependent of scan rate on current indicates that the system undergoes diffusion-controlled process.

    Original languageEnglish
    Pages (from-to)553-560
    Number of pages8
    JournalE-Journal of Chemistry
    Volume8
    Issue number2
    DOIs
    Publication statusPublished - Apr 2011

    Keywords

    • Current enhancement
    • Cyclic voltammetry
    • Modified glassy carbon electrode
    • Paracetamol

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