Figure 2From: Application of a modified graphene nanosheet paste electrode for voltammetric determination of methyldopa in urine and pharmaceutical formulationCV responses. (a) Unmodified CPE in 0.1 M PBS (pH 7.0) at scan rate of 10 mV s−1. (b) As (a) + 0.35 mM methyldopa. (c) As (a) at the surface of 2,7-BFGPE. (d) As (b) at the surface of GPE. (e) As (b) at the surface of 2,7-BFCPE. (f) As (b) at the surface of 2,7-BFGPE.Back to article page