Voltammetric Determination of Epinephrine in Pharmaceutical Sample with a Tyrosinase Nanobiosensor

Figure 8

Differential pulse voltammograms of the CP/MWCNT/Tyr/Nafion biosensor at different concentration of EP; (a) baseline, (b)  M, (c)  M, (d)  M, (e)  M, (f)  M, and (g)  M. Inset: plot of peak current as a function of EP concentration (Tyr: 313.087 U/mL; supporting electrolyte: 50 mM phosphate buffer, pH 7.0; scan rate: 50 mV/s; and Nafion: 5 µL; error bars indicate the standard deviations ).