Voltammetric Determination of Codeine on Glassy Carbon Electrode Modified with Nafion/MWCNTs

Figure 6

Dependence of the peak current on preconcentration time in the range from 0 to 480 s for 10 μM codeine in 0.1 M phosphate buffer (pH 3.0) and volume of Nafion/MWCNTs 10 μL and obtained voltammograms. All other conditions are as in Figure 5.