Abstract
The effect that micellar aggregates have on the electrochemical response of some compounds is indeed interesting, because adsorption and solubility of electrochemically active compounds may induce changes in the redox potential, in the charge transfer and on the diffusion coefficients of the species predominating in solution. This work studies the behavior of adrenaline in the presence of different SDS concentrations on carbon paste electrodes, CPE, with particular reference to its diffusion-controlled redox mechanism, which has an associated chemical reaction step. On consideration of its heterogeneous reaction constant, ko, the overall process is said to be quasi-reversible with one electron transferred. Therefore, it is rightly interpreted that the adrenaline's oxidation mechanism changes drastically in the presence of SDS, whereby the latter favors oxidation of the former, also becoming adsorption-controlled. These results indeed support the applicability of an analytical procedure for the neurotransmitter's quantification
Published Version
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