Voltammetric Determination of Ferulic Acid by Didodecyldimethylammonium Bromide/Nafion Composite Film-modified Carbon Paste Electrode

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  • LUO Liqiang
    College of Sciences, Shanghai University
  • WANG Xia
    College of Sciences, Shanghai University
  • LI Qiuxia
    College of Sciences, Shanghai University
  • DING Yaping
    College of Sciences, Shanghai University
  • JIA Jianbo
    State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
  • DENG Dongmei
    College of Sciences, Shanghai University

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Abstract

A simple and rapid method for the determination of ferulic acid in pharmaceutical formulations by didodecyldimethylammonium bromide (DDAB)/Nafion composite film-modified carbon paste electrode is presented. The electrochemical behavior of ferulic acid at the proposed electrode was investigated by cyclic voltammetry and a well-defined oxidation peak was observed at +0.44 V versus saturated calomel electrode in 0.1 M acetate buffer (pH 5.5) solutions. Some experimental parameters affecting the electrochemical response of the modified electrode were optimized. Under optimal conditions, the oxidation peak currents of ferulic acid increase linearly with the concentration of ferulic acid in the range from 2.0 × 10−6 to 1.2 × 10−4 M with a detection limit of 3.9 × 10−7 M (S/N = 3). The proposed method was successfully applied to the determination of ferulic acid in pharmaceutical tablets.

Journal

  • Analytical Sciences

    Analytical Sciences 26 (8), 907-911, 2010

    The Japan Society for Analytical Chemistry

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