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SW stripping voltammograms for 7.5 μg mL−1 favipiravir in BR buffer solution at pH 8.0 in the presence of different CTAB concentrations (2.5 × 10−5-7 × 10−4 M). Dashed line represents the voltammograms without CTAB. Inset: the plot of ip vs. the concentration of CTAB. Electrode, CPT-BDD; accumulation period 60 s at open-circuit condition; SWV parameters: frequency, 75 Hz; step potential, 10 mV; pulse amplitude, 50 mV.
