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Fabrication of amperometric cholesterol biosensor based on SnO2 nanoparticles and Nafion-modified carbon paste electrode

  • Gözde Aydoğdu Tığ EMAIL logo , Derya Koyuncu Zeybek and Şule Pekyardımcı
Published/Copyright: February 2, 2016
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Chemical Papers
From the journal Chemical Papers Volume 70 Issue 6

Abstract

This study reports the fabrication of an amperometric cholesterol biosensor based on cholesterol oxidase (ChOx), SnO2NPs and Nafion-modified carbon paste enzyme electrodes (CPE/SnO2NPs-ChOx/Naf). The electrochemical characterisations of BCPE and CPE/SnO2NPs were performed using CV and EIS. The determination of cholesterol was carried out by electrochemical oxidation of H2O2 at 0.6 V vs. Ag/AgCl. The CPE/SnO2NPs-ChOx/Naf presented a linear range from 0.20 μmol L−1 to 4.95 μmol L−1 with a low limit of detection (0.04 μmol L−1 ). In addition, the optimal values for pH and temperature were found to be 7.5 and 35°C, respectively. The CPE/SnO2NPs-ChOx/Naf was used for the determination of cholesterol in serum samples and good results were obtained

Keywords: cholesterol biosensor; carbon paste electrode; amperometry; SnO2 nanoparticles

Acknowledgements.

The authors wish to thank the Ankara University Research Fund (BAP) for the financial support received.

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Received: 2015-8-5
Revised: 2015-11-19
Accepted: 2015-11-19
Published Online: 2016-2-2
Published in Print: 2016-6-1

© 2016 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.1515/chempap-2016-0005
Keywords for this article
cholesterol biosensor; carbon paste electrode; amperometry; SnO2 nanoparticles

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