A New Sensitive Sensor for Simultaneous Differential Pulse Voltammetric Determination of Codeine and Acetaminophen Using a Hydroquinone Derivative and Multiwall Carbon Nanotubes Carbon Paste Electrode

<div>(a) Differential pulse voltammograms of HTP-MWCNT-CPE in a 0.15 M phosphate buffer solution (pH 7.0) containing different concentrations of codeine and acetaminophen. The numbers 1–21 correspond to 1.3–168.2 <i>μ</i>M of codeine and 0.95–125.8 <i>μ</i>M of acetaminophen. Inset shows differential pulse voltammogram of a mixed solution of 50.0 <i>μ</i>M of codeine and 110.0 <i>μ</i>M of acetaminophen at CPE. (b) and (c) show the plot of the corrected electrochemical peak currents as a function of codeine and acetaminophen concentrations in the range 1.3–168.2 <i>μ</i>M and 0.95–125.8 <i>μ</i>M, respectively.</div>

International Journal of Analytical Chemistry

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Figure 6

Figure 6: A New Sensitive Sensor for Simultaneous Differential Pulse Voltammetric Determination of Codeine and Acetaminophen Using a Hydroquinone Derivative and Multiwall Carbon Nanotubes Carbon Paste Electrode 

Figure 6 | A New Sensitive Sensor for Simultaneous Differential Pulse Voltammetric Determination of Codeine and Acetaminophen Using a Hydroquinone Derivative and Multiwall Carbon Nanotubes Carbon Paste Electrode 