A novel carbonaceous material was prepared from a digitonin (DG)-doped coal tar pitch (CTP) with a tube furnace under nitrogen atmosphere. It was used as an electrode after mixing the material with an organic binder (resin). The new carbon electrode was denoted as CTP-DG. CTP-DG was characterized by cyclic voltammetry (CV), infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The electrode was used for the determination of dopamine (DA) by differential pulse voltammetry (DPV). It exhibits a linear response to DA in the range of 1-60 µM. The detection limit (S/N = 3) for DA is 80 nM. Satisfactory results were achieved for the determination of DA in human urine samples.
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