Figure 5From: Application of a modified graphene nanosheet paste electrode for voltammetric determination of methyldopa in urine and pharmaceutical formulationChronoamperograms obtained at 2,7-BFGPE in 0.1 M PBS (pH 7.0) for different concentrations of methyldopa. Numbers 1 to 6 correspond to 0.0, 0.1, 0.4, 0.7, 1.1, and 1.6 mM of methyldopa, respectively. Insets: (A) Plots of I vs. t−1/2 obtained from chronoamperograms 2 to 6. (B) Plot of the slope of the straight lines against methyldopa concentration.Back to article page