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.
Highlights
Graphene paste electrode was used for the determination of bioactive molecules because of the easy fabrication of polymer modified electrode, reclaimable and good response and less background current [1 - 8]
The surface morphology of bare graphene paste electrode (BGPE) and PPMGPE was determined by FESEM
Morphology of the (a) BGPE and (b) PPMGPE is shown in Figs. (3a) and (b), respectively
Summary
Graphene paste electrode was used for the determination of bioactive molecules because of the easy fabrication of polymer modified electrode, reclaimable and good response and less background current [1 - 8]. Very few modified electrodes were fabricated by using graphene paste, polymer and surfactants for the analysis of CC by using voltammetric techniques. With the enhancement of the requirement for environmental quality, there should be a set of fast and adequate detection technique. In this way, it is important to build up a fast, simple and sensitive way to detect CC.
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