The Characterization of Screen-Printed Copper Electrodes Modified with Chitosan/Reduced Graphene Oxide for Epinephrine Detection

Abstract

Abstract In this study, the working electrode (WE) from Screen-Printed Copper modified with chitosan/rGO to detect epinephrine has been successfully performed by using electrodeposition method. Samples are conducted by varying the rGO concentration (300, 350, 400, 450, and 500) ppm with chitosan 1:1 (v/v). The obtained working electrodes were tested for FTIR to determine the functional group, the surface area of WE, characterized by SEM, and amperometry method to determine the output voltage optimum. The FTIR analysis confirmed N-H, OH, C-H, NH2, and C-H in all chitosan and chitosan/rGO. The SEM images showed that CS/rGO film morphology was smoother than CS film. It can be assumed the rGO was distributed well onto CS film. The amperometry test results also showed that the working electrode produced the maximum output voltage from CS/rGO 350 ppm at 0.1032 V. It can be concluded that the working electrode from the screen-printed copper electrodes modified with chitosan/reduced graphene oxide can be used to detect the epinephrine.