Albayrak, IsaErkal, AsliYavuz, SametKariper, Ishak AfsinMulazimoglu, Ibrahim EnderUstundag, Zafer2024-02-232024-02-2320171094-29121532-2386https://doi.org/10.1080/10942912.2016.1213743https://hdl.handle.net/20.500.12452/13184In this study, graphene oxide was derivative with 5-aminoisophtalic acid by amidization reaction. The nanomaterial in suspension was denoted as graphene oxide-isophtalic acid. The graphene oxide-isophtalic acid suspension was covered on the glassy carbon electrode surface under the infrared lamb. The graphene oxide was characterized with transmission electron microscopy and x-ray diffraction. Surface characterization of the glassy carbon/graphene oxide-isophtalic acid was performed with x-ray photoelectron spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The ultrasensitive nanoplatform for the simultaneous electrochemical square-wave anodic stripping voltammetry assay of Bi3+ and Cd2+ in aqueous solution has been developed on the glassy carbon/graphene oxide-isophtalic acid. The linearity range of Bi3+ and Cd2+ were 1.0x10(-8) - 1.0x10(-12) M (S/N = 3). The responses of species were practically unaltered with the increase of various species concentration. The detection limits of Cd2+ and Bi3+ were determined as 8.1x10(-13) M and 1.06x10(-13) M, respectively. The electrode performance was checked with tap water and commercially milk samples.eninfo:eu-repo/semantics/openAccessGraphene OxideSurface Modification And CharacterizationSquare Wave Anodic Stripping VoltammetryHeavy Metal AnalysisIsophtalic Acid Terminated NanofilmArticle207155815682-s2.0-84995610535Q2WOS:000400459900012Q210.1080/10942912.2016.1213743