Pada penelitian ini, graphene oxide disintesis menggunakan metode improved hummers, sedangkan nanozeolit disintesis menggunakan metode top down dengan alat ball mill. Dua material tersebut dikompositkan menjadi elektroda kerja untuk analisis asam salisilat secara siklik voltametri. Graphene oxide perlu dimodifikasi untuk meningkatkan sensitivitasnya terhadap analit sehingga elektroda kerja graphene oxide perlu dimodifikasi yaitu dikompositkan dengan nanozeolit. Faktor yang mempengaruhi hasil arus puncak dalam analisis secara siklik voltametri adalah komposisi elektroda, pH larutan, waktu deposisi dan laju pindai. Pada penelitian ini, asam salisilat yang dianalisis menggunakan elektroda kerja graphene oxide- nanozeolit memiliki komposisi terbaik dengan perbandingan graphene oxide : parafin : nanozeolit yaitu 3 : 2 : 5, pH larutan optimum yaitu 2, waktu deposisi optimum yaitu 5 detik dan laju pindai optimum yaitu 100 mV/detik. Dalam analisis asam salisilat secara siklik voltametri, elektroda kerja graphene oxide-nanozeolit memiliki limit deteksi hingga 0,467 ppm dengan persen recovery sebesar 99,292%.
Kata kunci : graphene oxide, nanozeolit, asam salisilat, siklik voltametri
In this study, graphene oxide was made by using improved hummer method and for nanozeolite was made by top down method with a ball mill. Both materials were used as graphene oxide-nanozeolite composite working electrode. The working electrodes used for the analysis of salicylic acid by cyclic voltammetry (CV). Graphene oxide needs to be modified by adding nanozeolite to increase its sensitivity to the analyte. Factors that influence the results of peak currents in a CV analysis are the electrode composition, pH, deposition time and scan rate. In this study, analysis of salicylic acid using graphene oxide-nanozeolite working electrode has the best composition with a ratio of graphene oxide: paraffin: nanozeolite which is 3: 2: 5, the optimum pH is 2, the optimum deposition time is 5 seconds and the optimum scan rate is 100 mV s-1. In the analysis of salicylic acid by CV, graphene oxide-nanozeolite working electrodes have a detection limit of up to 0.467 ppm with a percent recovery of 99.292%.
Keywords: graphene oxide, nanozeolite, salicylic acid, cyclic voltammetry