Synthesis of graphene oxide-nanozeolite composite electrode for aspirin analysis by cyclic voltammetry

Abstract

A graphene oxide-nanozeolite composite was prepared and empolyed as electrode for cyclic voltammetric analysis of aspirin. Graphene oxide was synthesized with the improved Hummer method, while nanozeolite synthesized using a mechanical ball milling method. Cyclic voltammetric analysis of aspirin was influenced by several factors viz. the composition of working electrode, pH, deposition time and scan rate. The optimized parameters of graphene oxide-nanozeolite composite electrode has the best composition at a ratio of 3:2:5 at pH of solution 4, deposition time at 5 s and scan rate at 100 mV s-1. A recovery percentage of 99.61% having limit detection of electrode was 0.0611 ppm (0.002 mM).