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).

中文翻译：

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用于法医电化学的电化学还原氧化石墨烯：检测可卡因及其掺杂物 扑热息痛、咖啡因和左旋咪唑

该通讯显示了电化学还原氧化石墨烯 (ERGO) 修饰电极在方波伏安法检测可卡因 (COC) 及其主要掺杂物扑热息痛 (PAR)、咖啡因 (CAF) 和左旋咪唑 (LEV) 方面的改进性能。这四种化合物可以在 ERGO 修饰电极上的单次伏安扫描中鉴定，与未修饰电极相比，具有足够的峰分辨率和电流增加（至少 2 倍）。此外，消除了通常在 CAF 和 LEV 氧化过程中验证的电极污垢。在实际 COC 样品中测定 CAF 和 PAR，并获得了令人满意的回收率值（分别为 103% 和 85%）。