Electrochemical Determination of Dopamine on a Glassy Carbon Electrode Modified by Using Nanostructure Ruthenium Oxide Hexacyanoferrate/Ruthenium Hexacyanoferrate Thin Film
Figure 1
(A) Repeated cyclic voltammograms recorded on GCE in an aqueous solution containing 0.05 M HCl, 0.5 M NaNO3, 1 mM K3FeCN6, and 1 mM RuCl3 at pH 1.5 to obtain GC/RuOHCF/RuHCF modified electrode. (B) Consecutive cyclic voltammograms recorded on GC/RuOHCF/RuHCF modified electrode in a solution containing only 0.05 M HCl and 0.5 M NaNO3. Scan rate: 100 mV/s. (C) EIS complex plane plots obtained on (a) the bare GCE and (b) GC/RuOHCF/RuHCF modified electrode in a solution containing only 0.5 M NaNO3 at pH 1.5, = +0.5 versus Ag/AgCl, = 15 mV, and frequency range: 10 kHz to 10 mHz.
