Improving the Voltammetric Determination of Hg(II): A Comparison Between Ligand-Modified Glassy Carbon and Electrochemically Reduced Graphene Oxide Electrodes

摘要: A new thiosemicarbazone ligand was immobilized through a Cu(I)-catalyzed click reaction on the surface of glassy carbon (GC) and electrochemically reduced graphene oxide (GC-ERGO) electrodes grafted with phenylethynyl groups. Using accumulation at open circuit followed by anodic stripping voltammetry, modified showed significant selectivity sensibility for Hg(II) ions. detection limit 7 nM achieved GC electrodes. Remarkably, GC-ERGO significantly improved (0.8 nM), sensitivity, linear range, which we attribute to an increased number binding sites better electron transfer properties. Both proved their applicability analysis real water samples.