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

Figure 6

Differential pulse voltammograms recorded in the presence of different concentration of DA in 0.1 M NH₄NO₃ at pH 5. The insets show the two linear range calibration curves extracted from the voltammograms; (a) lower range and (b) upper range. See the text for details.