Fig. 4. (A) DPV curves of the CB–MWNT–Nafion/Fc/CB–MWNT/GC modified electrode in PBS contained SA and IAA with the same concentration changes (25 μM, 50 μM, 125 μM, 200 μM, 300 μM, 400 μM, 600 μM, 800 μM, 1000 μM, (a) to (i)); (B) the linear relationships of IAA/Fc versus IAA concentrations, and SA/Fc versus SA concentrations.
