Abstract
Abstract The electrochemical behavior of paracetamol (PA) and dopamine (DA) has been investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV) using a selective and sensitive iron oxide (Fe2O3) nanoparticle modified carbon paste electrode (IOCPE). The PA and DA showed an anodic peak potential at 0.458 V and 0.247 V and a cathodic peak potential at 0.088 V and 0.11 V (vs Ag/AgCl), respectively. In the DPV mode, PA and DA gave linear responses over the concentration range of 2–150 μM (R2 = 0.998) and 2–170 μM (R2 = 0.989), respectively. The limit of detection (LOD = 3 s/m) for PA and DA were found to be 1.16 and 0.79 μM, respectively. IOCPE possesses an excellent electrocatalytic activity towards the determination of PA and DA. The proposed method could be successfully validated for the simultaneous and individual determination of PA and DA present in pharmaceutical and real samples.
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