Figure 6.

Experimental nonfaradaic current (no BHT additioned) for 10 mL of solution containing 20% ACN in Britton–Robinson buffer at pH 5.54 and 7. Sweep rate is 10 mV/s. The working electrode was a glassy carbon disk electrode with a platinum wire as the auxiliary electrode and a Ag/AgCl (KCl 3 M) as the reference electrode. A simulation of the nonfaradaic current, applying eq 14, is shown in green. RMSE = 0.0947 μ A. The CV IUPAC convention was implemented. An anodic scan was performed from the starting point in all voltammograms, as marked with a red dot and arrow.