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Electrochemical sensor for Baicalein using a carbon paste electrode doped with carbon nanotubes

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Abstract

We report on the voltammetric determination of the flavonoid Baicalein by using a carbon paste electrode that was doped with multi-walled carbon nanotubes. The resulting sensor exhibits excellent redox activity towards Baicalein due to the large surface area and good conductivity of the electrode. Cyclic voltammetry at various scan rates was used to investigate the redox properties of Baicalein. At the optimum conditions, the sensor displays a linear current response to Baicalein in the 0.02–10 μM concentration range, with a limit of detection of 4.2 n M. The method was successfully applied to the determination of Baicalein in spiked human blood serum samples and in a Chinese oral liquid.

We construct a new voltammetric sensor, based on multi-walled carbon nanotubes (MWCNT) doped Carbon paste electrode(CPE), The proposed electrode can improve the oxidation of Baicalein intensively, which can applied to the quantitative determination of Baicalein with wide linear response and low detection limit.

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Acknowledgments

The authors really appreciate for the financial support from the National Natural Science Foundation of China (Grant Nos. 20875083 & 20775073) and the Innovation Scientists & Technicians Troop Construction Projects of Zhengzhou City (10LJRC192).

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Authors and Affiliations

  1. Department of Chemistry, Zhengzhou University, Zhengzhou, 450001, China

    Jing Zhou, Kai Zhang, Ge Song, Jie Liu & Baoxian Ye

  2. Department of Material and Chemistry Engineering, Henan Institute of Engineering, Zhengzhou, 450007, China

    Fei Wang

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  1. Jing Zhou
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  2. Fei Wang
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  3. Kai Zhang
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  4. Ge Song
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  5. Jie Liu
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  6. Baoxian Ye
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Correspondence to Baoxian Ye.

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Zhou, J., Wang, F., Zhang, K. et al. Electrochemical sensor for Baicalein using a carbon paste electrode doped with carbon nanotubes. Microchim Acta 178, 179–186 (2012). https://doi.org/10.1007/s00604-012-0812-7

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  • DOI: https://doi.org/10.1007/s00604-012-0812-7

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