Fig. 2From: Voltammetric analysis of pholcodine on graphene-modified GNPs/PTs with green assessmentCyclic voltammograms of 4.8 mM K4[Fe(CN)6] in 0.1 M KCl using GNPs electrode (black line) and GNPs/PTs electrode (red line), scan rate 75 mV/s, showing the effect of PTs modification on electron transfer efficiencyBack to article page