Fig. 6.

SW stripping voltammograms for favipiravir levels of (1–5) 0.01, 0.025, 0.05, 0.075 and 0.10 μg mL⁻¹ (A), and (1–10) 0.1, 0.25, 0.5, 1.0, 2.5, 5.0, 7.5, 10.0, 15.0 and 20 μg mL⁻¹ (B) in BR buffer solution at pH 8.0 containing 6 × 10⁻⁴ M CTAB. Inset shows the corresponding calibration plot for the quantitation of favipiravir. The other operating conditions as indicated in Fig. 5.