Electrochemical Determination of Dopamine on a Glassy Carbon Electrode Modified by Using Nanostructure Ruthenium Oxide Hexacyanoferrate/Ruthenium Hexacyanoferrate Thin Film

Figure 8

Differential pulse voltammograms obtained on GC/RuOHCF/RuHCF electrode. Solutions prepared by standard addition into the blood plasma as follows: (a) 0.00, (b) 5.0, (c) 12.5, (d) 25.0, (e) 37.5, and (f) 50.0 μL of 2 mM DA solution. Inset shows calibration curve obtained from variations of the stripping peak current as a function of DA concentration (see the text for details).