Abstract
A simple, sensitive, and reliable carboxylic group functionalized single-walled carbon nanotubes (f-SWCNTs)/poly(hydroxymethylated-3,4-ethylenedioxythiophene) (PEDOTM) modified glassy carbon electrode (GCE) was successfully developed for the electrochemical determination of catechin (CAT). In view of the merits of extraordinary conductivity of PEDOTM and excellent electrocatalytic property of f-SWCNTs, the f-SWCNTs/PEDOTM/GCE modified electrode exhibited a strong electrocatalytic activity for the oxidation of CAT. Under optimized conditions, the proposed modified electrode showed a wide linear response for CAT in the concentration range between 0.039 and 40.84 μM, with a low detection limit of 0.013 μM. Furthermore, the modified electrode also exhibited a good reproducibility and long-term stability, as well as high selectivity, which also was a good candidate for the electrochemical detection and analysis of CAT in commercial green tea.
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Acknowledgments
The authors would like to acknowledge the financial support of this work by the National Natural Science Foundation of China (No. 51463008, 51272096, and 51263010), GanPo Outstanding Talents 555 Projects, Jiangxi Provincial Department of Education (No. GJJ12595, GJJ13565), Youth Science and Technology Talent Training Plan of Chongqing Science and Technology Commission (cstc2014kjrc-qnrc10006).
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Yuanyuan Yao and Long Zhang contributed equally to this work.
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Yao, Y., Zhang, L., Wen, Y. et al. Voltammetric determination of catechin using single-walled carbon nanotubes/poly(hydroxymethylated-3,4-ethylenedioxythiophene) composite modified electrode. Ionics 21, 2927–2936 (2015). https://doi.org/10.1007/s11581-015-1494-z
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DOI: https://doi.org/10.1007/s11581-015-1494-z