Electrochemically Reduced Graphene Oxide for Forensic Electrochemistry: Detection of Cocaine and its Adulterants Paracetamol,Caffeine and Levamisole

This communication shows the improved performance of electrochemically‐reduced graphene oxide (ERGO) modified electrodes for the square‐wave voltammetric detection of cocaine (COC) and its main adulterants paracetamol (PAR), caffeine (CAF) and levamisole (LEV). The four compounds can be identified in a single voltammetric scan on the ERGO‐modified electrode with adequate resolution of peaks and increase in current (at least 2‐fold) in comparison with the unmodified electrode. Moreover, electrode fouling typically verified during the oxidation of CAF and LEV is eliminated. CAF and PAR were determined in a real COC sample and satisfactory recovery values were obtained (103 and 85 %, respectively).