عنوان المقالة:التقدير الكهروكيميائي للتتراسايكلين على القطب العامل المحور بمتراكب نانوي Electrochemical Determination of Tetracycline at SPCE modified with Nanocomposite
An electrochemical sensor based on manganese dioxide nanorodMnO2and Graphene oxide (GO)
functionalized with 4-amino, 3-substituted 1H, 1, 2, 4 Triazole 5(4H) thion
(FGO)/MnO2Nanocompositewas developed for voltammetric determination of Tetracycline (TET).The
working electrode WE of SPCE was modified bya drop casting method. X-ray powder diffractometer
(XRD), scanning electron microscopy (SEM) and FT-IR were employed to characterize the synthesized
FGO/MnO2. The determination of TET at the modified electrode was studied by cyclic voltammetry (CV)
and differential pulse voltammetry (DPV) in the phosphate buffer solution (PBS).TET show sharp
increase in the oxidation peaks in the pH 2.Voltammetric characteristics of TET (Epa, Ipa) were
estimated. From effect of scan rate, the average surface coverage (Γ) of TET on the surface of SPCE
modified with FGO/MnO2 nanocomposite, the electron transfer coefficient and electron transfer constant
rate ket was obtained as 10.56×1014 molecule cm-2, 0.5, and 10.41 cm.s-1respectively. Under the optimal
conditions, the peak current shows linear relationship with concentration of Tetracycline (TET) ranges
1–9 μM with the detection limit of 0.2μ M. The modified SPCE was successfully used to detect TET
د.سندس هادي مرزا | dr.Sundus Hadi Merza | 12377