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Amperometric detection of cholesterol by nanocomposite graphite paste electrode

Author Affiliations

  • 1Department of Physics Research Center, Ahmednagar College Ahmednagar, MS, India
  • 2Department of Physics Research Center, Ahmednagar College Ahmednagar, MS, India
  • 3Department of Physics Research Center, Ahmednagar College Ahmednagar, MS, India
  • 4Department of Physics Research Center, Ahmednagar College Ahmednagar, MS, India
  • 5Institute of Technology, Kuran, Pune, MS, India
  • 6Department of Physics Research Center, Ahmednagar College Ahmednagar, MS, India
  • 7Department of Physics, Shri Anand College, Pathardi, MS, India

Res. J. Physical Sci., Volume 5, Issue (6), Pages 1-5, August,4 (2017)


A novel electrochemical cholesterol biosensor based on graphite (Gr) paste electrode modified with polyaniline (PANI) and has been developed for selective and quantitative recognition of cholesterol by immobilizing enzyme cholesterol oxidase (ChO) for monitoring the potentiometric response. Cholesterol oxidase immobilization on electrode was investigated using a amperometric method, and factors affecting its immobilization such as potential, pH was discussed in detail. The amperometric of the developed cholesterol biosensor was evaluated, and the obtained cholesterol biosensor exhibited shorter response time (3 s), wider range 0.1-10 µM and the detection limit were found to be 1x10-9M. Enzyme activity is 85% retained for 60 days.


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