مشخصات پژوهش

عنوان	Multi-wall carbon nanotubes as a sensor and ferrocene dicarboxylic acid as a mediator for voltammetric determination of glutathione in hemolysed erythrocyte
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Multi-wall carbon nanotubes, ferrocene dicarboxylic acid,glutathione
چکیده	A sensitive and selective electrochemical method was developed for determination of glutathione (GSH) in hemolysed erythrocyte using a ferrocene dicarboxylic acid modified carbon nanotubes paste electrode (FDCCNTPE). Cyclic voltammetry (CV), double potential-step chronoamperometry and differential pulse voltammetric (DPV) were used to investigate the suitability of ferrocene dicarboxylic acid at the surface of a multi-wall carbon nanotubes paste electrode as a mediator for the electrocatalytic oxidation of glutathione in aqueous solutions with various pH. The results showed that FDCCNTPE had high electrocatalytic activity for the electrooxidation of glutathione. Under optimum conditions (pH 7.00), oxidation of GSH occurs at a potential about 230 mV less positive than that at the unmodified carbon nanotubes paste electrode. The catalytic reaction rate constant,khwas calculated (1.98 10 4M1 s 1) using chronoamperometry. The electrocatalytic oxidation peak current of GSH showed two linear dynamic ranges with a detection limit of 0.2mmol L1 GSH. The linear calibration ranges were obtained between 0.5–24mmol L1 and 24–122mmol L1 GSH using the DPV method. Finally, the proposed method was also examined as a selective, simple and precise electrochemical sensor for the determination of GSH in real samples such as hemolysed erythrocyte.
پژوهشگران	پوریا بی پروا (نفر پنجم)، محمد رضا حاج محمدی (نفر چهارم)، حسن کریمی مله (نفر سوم)، رضا اوجانی (نفر دوم)، جهانبخش رئوف (نفر اول)