RESEARCH ARTICLE


Electrochemical Polymerised Graphene Paste Electrode and Application to Catechol Sensing



Jamballi G. Manjunatha*
Department of Chemistry, FMKMC College, Madikeri, Mangalore University Constituent College, Karnataka, India


© 2019 Jamballi G. Manjunatha

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Chemistry, FMKMC College, Madikeri, Mangalore University Constituent College, Karnataka, India; Tel: +91- 08272228334; E-mail: manju1853@gmail.com


Abstract

Objective:

To build up an advantageous strategy for sensitive determination of catechol (CC), a poly (proline) modified graphene paste electrode (PPMGPE) was fabricated and used as a voltammetric sensor for the determination of CC.

Methods:

The performance of the modified electrode was studied using cyclic voltammetric (CV) and differential pulse voltammetric method (DPV). The modified electrode was characterized by CV and DPV. The surface of the modified electrode was examined by FESEM. The electrochemical behavior of CC in phosphate buffer solution (pH 7.5) was inspected using bare graphene paste electrode (BGPE) and PPMGPE.

Results & Conclusion:

The PPMGPE shows a lower limit of detection, calculated to be 8.7×10–7mol L−1 (S/N=3). This modified electrode was applied successfully for the determination of CC in water samples without applying any sample pretreatment.

Keywords: Poly (proline) modified graphene paste electrode, Catechol, Cyclic voltammetry, Water sample analysis, Detection limit.