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A sensitive amperometric hydrogen peroxide sensor based on thionin/EDTA/carbon nanotubes—chitosan composite film modified electrode

Authors
  • Zhang, Keying1, 2
  • Zhang, Li1, 2
  • Xu, Jigui1, 2
  • Wang, Cong1, 2
  • Geng, Tao1, 2
  • Wang, Hongyan1, 2
  • Zhu, Jun1, 2
  • 1 Suzhou University, Anhui Key Laboratory of Spin Electron and Nanomaterials (Cultivating Base), Suzhou, Anhui, 234000, People’s Republic of China , Suzhou (China)
  • 2 Suzhou University, Department of Chemistry-Biology, Suzhou, Anhui, 234000, People’s Republic of China , Suzhou (China)
Type
Published Article
Journal
Microchimica Acta
Publisher
Springer-Verlag
Publication Date
Jul 29, 2010
Volume
171
Issue
1-2
Pages
139–144
Identifiers
DOI: 10.1007/s00604-010-0409-y
Source
Springer Nature
Keywords
License
Yellow

Abstract

A sensitive amperometric sensor has been constructed for the determination of hydrogen peroxide (HP). It is based on a glassy carbon electrode modified with a composite made from thionin, EDTA, multiwalled carbon nanotubes, and chitosan. Thionin was covalently immobilized on the surface of the electrode. The sensor exhibits a powerful electrocatalytic activity for the reduction of HP. The amperometric signal is proportional to the concentration of HP in the range from 0.2 μM to 85.0 μM, with a detection limit of 0.065 μM. The sensor displays excellent selectivity, good reproducibility and long-term stability.

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