Voltammetric Determination of Epinephrine in Pharmaceutical Sample with a Tyrosinase Nanobiosensor

Figure 1

Cyclic voltammograms of the unmodified and modified biosensors: (a) CP/Nafion electrode; (b) CP/MWCNT/Nafion; and (c) CP/MWCNT/Tyr/Nafion in 50 mM phosphate buffer, pH 7.0 (: 25°C; Tyr: 313.087 U/mL; scan rate: 50 mV/s; EP:  M; MWCNT: 1% (w/w); and Nafion: 5 µL).