pp. 85-94
S&M1303 Research Paper https://doi.org/10.18494/SAM.2017.1416 Published: January 25, 2017 Determination of Dopamine in the Presence of Ascorbic Acid on Digitonin-Doped Coal Tar Pitch Carbonaceous Electrode [PDF] İlknur Üstündağ and Aslı Erkal (Received June 10, 2016; Accepted September 1, 2016) Keywords: digitonin, coal tar pitch, carbonaceous electrode, dopamine, differential pulse voltammetry
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. CTPDG 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.
Corresponding author: ilknur ÜstündağCite this article İlknur Üstündağ and Aslı Erkal, Determination of Dopamine in the Presence of Ascorbic Acid on Digitonin-Doped Coal Tar Pitch Carbonaceous Electrode, Sens. Mater., Vol. 29, No. 1, 2017, p. 85-94. |