Fig. 5. (a) DPVs of MoS₂-PANI/rGO/GCE and (b) the plot of peak currents vs. concentrations of AA from 50 μM to 8.0 mM with 75 μM DA and 75 μM UA. (c) DPVs of MoS₂-PANI/rGO/GCE and (d) the plot of peak currents vs. concentrations of DA from 5.0 to 500 μM with 1.0 mM AA and 75 μM UA. (e) DPVs of MoS₂-PANI/rGO/GCE and (f) the plot of peak currents vs. concentrations of UA from 1.0 μM to 500 μM with 1.0 mM AA and 75 μM DA. The solution was PBS (pH 7.0, 0.1 M) containing 0.1 M KCl in the experiment.