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

Figure 1

The cyclic voltammograms obtained for 50 μM codeine at the GC electrode modified with 10 μL Nafion/MWCNTs in 0.1 M phosphate buffer (pH 3.0). Scan rate in the range from 10 to 500 mV s⁻¹ (inner figure: dependence of the codeine peak current on square root of scan rate).