Making of graphene oxide-nanozeolite composite as a working electrode for salicylic acid analysis using cyclic voltammetry

In this study, graphene oxide was made by using improved hummer method and nanozeolite was made by using a top down method with a ball mill as a working electrode for the analysis of salicylic acid by cyclic voltammetry. Graphene oxide needs to be modified to increase its sensitivity to the analyte so that the graphene oxide working electrode is modified with a modifier, namely nanozeolite. In this study, analysis of salicylic acid using graphene oxide-nanozeolite working electrodes has the best composition with a ratio of graphene oxide: paraffin: nanozeolite which is 3: 2: 5, the optimum solution pH is 2, the optimum deposition time is 5 seconds and the optimum scan rate is 100 mV/second. In the analysis of salicylic acid by cyclic voltammetry, graphene oxide-nanozeolite working electrodeshave a detection limit of up to 0.467 ppm with a percent recovery of 99.292%.