Abstract:
The coronavirus 2019 (COVID-19) is a contagious disease that spreads quickly. Therefore, favipiravir (FAV) drug has been developed to inhibit the widespread infection of COVID-19 by stopping the multiplication of the SARS-CoV-2 virus. In this research, cyclic voltammetry (CV) and square-wave anodic stripping voltammetry (SWASV) were used to develop a new sensor for the determination of FAV using catalytic and stable properties of manganese dioxide co-immobilized with poly(4-vinylpyridine) on the glassy carbon electrode (GCE) surface. The modified GCE cyclic voltammogram showed a peak potential of 0.15 mM FAV in 0.05 M phosphate buffer solution pH 7.4 at +1.2 V. This modified GCE showed high catalyst activity compared to the unmodified GCE at 2 times. It was tested by SWASV and found the optimized parameters for 0.50 mM FAV at +0.9 volts, 20 s, and 0.020 volts for the preconcentration step, preconcentration time, and potential amplitude, respectively. This sensor showed a linearity range of 10 500 μM with a detection limit of 0.29 μM (S/N = 3)