According to the optimum conditions, differential pulse voltammograms
were recorded for BPR determination. As can be seen from
Fig. 4A, the DPV signal was enhanced along with the increasing
concentration of BPR. Fig. 4B demonstrates the linear relationship
between concentrations of BPR and the DPV current responses of the
electrode in the presence of 0.24 mM SDS under the optimized instrument
parameters and experimental conditions.