*3.2. Voltammetric Measurements*

Cyclic voltammetry analysis was accomplished with the BDD (Adamant Technologies, B/C radio about 500 ppm with a surface of 1 cm2) as the working electrode, Ag/AgCl as the reference electrode, and platinum wire as the counter electrode in a solution of 42 mM Na2SO4 containing 50 mg·L−<sup>1</sup> of the drug. The experiment was carried out in a 10 mL electrochemical cell, at room temperature. Cyclic voltammograms were performed with a PGSTAT 30 Autolab potentiostat/galvanostat.
