The electrochemical oxidation behavior of hydrochlorothiazide (HCT) on a glassy carbon as a working electrode was investigated in BrittoneRobinson (BeR) buffer pH 3, by using anodic stripping voltammetry (ASV) and cyclic voltammetry (CV). This drug gave a welldefined voltammetric oxidation peak at þ 1200 mV versus an Ag/AgCl reference electrode. The electrochemical oxidation process was shown…