Electrochemical Biosensor Based on Boron-Doped Diamond Electrodes with Modified Surfaces

Figure 3

Current-time responses of the BDD electrode (1) and the BDDMN electrode (2) through successive addition of UA (each step of the curves indicates 0.013, 0.026, 0.04, 0.052, 0.064, 0.076, 0.088, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, and 0.4 mM from low to high) in 0.1 M PBS solution at an applied potential of 0.4 V (versus SCE, for both electrodes, the oxidation current response occurs at 0.4 V).