Fig. 4.
Cyclic voltammograms of 1.0 × 10−4 mol/L metronidazole (MTZ) in 0.1 mol/L phosphate buffer (pH 7.0) for bare SPE, rGO-NF/SPE and C60-rGO-NF/SPE. Scan rate=25 mV/s. NF: Nafion.
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