A New Strategy to Pretreat Carbon Nanofiber and Its Application in Determination of Dopamine

Figure 8

Differential pulse voltammograms at the CNF-CPE for AA (5 𝜇M) in the presence of DA with different concentrations: (a) 0.4, (b) 0.6, (c) 0.8, (d) 1.0, (e) 1.4, (f) 1.8, (g) 2.0, (h) 2.4, and (i) 2.8 𝜇M. DPV measurements were performed from −0.1 to 0.7 V with the pulse amplitude of 50 mV and the pulse width of 50 ms. Inset plot shows the dependence of the response currents of the CNF-CPE electrode on the concentration of DA in 0.1 M PBS (pH 6.0).