Voltammetric Determination of Acetaminophen in the Presence of Codeine and Ascorbic Acid at Layer-by-Layer MWCNT/Hydroquinone Sulfonic Acid-Overoxidized Polypyrrole Modified Glassy Carbon Electrode
(a) Differential pulse voltammograms of 0.1 M phosphate buffer solution containing various concentrations of AC (down to up); 0.2, 0.5, 0.8, 1, 2, 3, 5 μM AC in the presence of 1 × 10−4 M codeine. (b) Linear calibration curve of the anodic peak current versus AC concentration added to (●) 0.1 M phosphate buffer solution of pH 7.0 and constant amount of codeine, (°) AC tablet solution buffered in same pH.
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