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Determination of ferulic acid in Chinese proprietary medicine based on a poly-glutamic acid film sensor

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Abstract

The poly-glutamic acid modified electrode has been prepared by direct electro-polymerization of D-glutamic acid on the surface of glassy carbon electrode. In pH 4.2, 0.1 mol L−1 HAc-NaAc buffer solution, the film modified electrode exhibited remarkable enhancement effect to the electrochemical responses of ferulic acid. The action mechanism was preliminarily explored. In the range of 2.0 × 10−7 to 1.0 × 10−5 mol L−1, and 1.0 × 10−5 to 3.0 × 10−4 mol L−1, the oxidation peak current has a linear relationship to the concentration, and the detection limit was estimated to be 7.0 × 10−8 mol L−1. This method has been adopted to detect trace amount of ferulic acid in Chinese proprietary medicine, and the recovery was from 97.8 to 102.4%.

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Authors and Affiliations

  1. Department of Chemistry, Tongji University, Shanghai, 200092, PR China

    Xiao-Gang Wang, Jing Li & Xing Zhang

  2. Department of Maths, Tongji University, Shanghai, 200092, PR China

    Ya-Juan Fan

Authors
  1. Xiao-Gang Wang
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  2. Jing Li
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  3. Ya-Juan Fan
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  4. Xing Zhang
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Corresponding author

Correspondence to Xiao-Gang Wang.

Additional information

Published in Russian in Elektrokhimiya, 2012, Vol. 48, No. 12, pp. 1272–1278.

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Wang, XG., Li, J., Fan, YJ. et al. Determination of ferulic acid in Chinese proprietary medicine based on a poly-glutamic acid film sensor. Russ J Electrochem 48, 1160–1165 (2012). https://doi.org/10.1134/S1023193512120142

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  • DOI: https://doi.org/10.1134/S1023193512120142

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