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

Electrochemical Polymerised Graphene Paste Electrode and Application to Catechol Sensing