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Electrochemical determination of maltol in food products using a poly(L-tryptophan) modified glassy carbon electrode

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Abstract

Herein, a poly(L-tryptophan) modified glassy carbon electrode (Ptry/GCE) for the determination of maltol is fabricated by electrochemical polymerisation. The electrochemical behaviour of maltol at the Ptry/GCE is studied by cyclic voltammetry (CV). The modified electrode shows excellent electrocatalytic activity towards the oxidation of maltol and the oxidation is a one-proton-one-electron process. In pH 8.0 phosphate buffer solution (PBS), the oxidation peak current of maltol shows a linear relationship with its concentration in the range from 9.00 × 10−5 to 3.75 × 10−3 mol L−1 with a correlation coefficient of 0.9972. The limit of detection is estimated to be 8.00 × 10−6 mol L−1. The novel method shows good selectivity, recovery, reproducibility and great convenience and has been satisfactorily demonstrated in real food sample analysis.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Heze University, Heze, 274015, P.R. China

    Mingyong Chao & Xinying Ma

Authors
  1. Mingyong Chao
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  2. Xinying Ma
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Correspondence to Mingyong Chao.

Additional information

Published in Russian in Elektrokhimiya, 2014, Vol. 50, No. 11, pp. 1184–1191.

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Chao, M., Ma, X. Electrochemical determination of maltol in food products using a poly(L-tryptophan) modified glassy carbon electrode. Russ J Electrochem 50, 1065–1071 (2014). https://doi.org/10.1134/S1023193514050048

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  • DOI: https://doi.org/10.1134/S1023193514050048

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