Electrochemical Study of the Formation of Surface Inclusion Complex of Ascorbic Acid with Immovilized β-Ciclodextrin and Carbon Nanotubes Over a Carbon Paste Electrode

This work dealt with the formation of supramolecular complexes that proved to be basic for the design of electrochemical sensors to undertake quantitative determination of an analyte of interest, like ascorbic acid, AA. Also, the results from this study demonstrated that the AA formed supramolecular complexes with β– cyclodextrine, β-CD, in solution and with its polymeric species: poly-β-CD, over the surface of a carbon paste working electrode that was modified with multiwalled-carbon nanotubes, MWCNT. The said three modifying agents permitted to discern the electrochemical response of the AA that interacted on the electrode surface, thus giving rise to a measurable response through an adsorption processes, particularly for the electrode modified with the poly-β-CD