Fig. 7. (a) DPV responses of 3D-rGO/β-CD/GCE in 0.1 M PBS (pH = 7.0) for 1 mM AA, 100 μM DA, 100 μM 5-HT and the mixture of 1 mM AA, 100 μM DA and100 μM 5-HT. (b) Amperometric responses of the 3D-rGO/β-CD/GCE for the addition of 100 μM DA and 200 μM glucose, 200 μM KCl and 200 μM NaCl in 0.1 M PBS (pH = 7.0).