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Keerti M. Naik,Sharanappa T. Nandibewoor 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
Electrochemical behavior of an anticancer drug, gemcitabine hydrochloride (GMB) was studied in 10.4pH with 0.2 M phosphate buffer solution as supporting electrolyte at 25 0.1 8C at gold electrode (GE)using different voltammetric techniques. The electrochemical process was observed to be diffusion controlled, irreversible and involving one-electron oxidation. Under optimal conditions, the peak current was proportional to GMB concentration in the range of 0.1–15 mM with a detection limit of 0.06 mM by differential pulse voltammetry. The method was developed for the determination of GMB in pharmaceutical formulations and urine as a real sample.
Abbar, Jyothi C.,Meti, Manjunath D.,Nandibewoor, Sharanappa T. The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.4
The electrocatalytic oxidative behavior of an antiarrhythmic drug, procainamide hydrochloride (PAH) at the gold electrode surface has been examined using different voltammetric methods like cyclic, linear-sweep and differential pulse voltammetry. Voltammograms obtained in this study reveal that the electrode exhibit excellent electrocatalytic activity towards oxidation of the drug. The parameters that can affect the peak current at different pH, scan rate and concentration were evaluated. The number of electrons transferred was calculated. The current displayed a wide linear response ranging from 0.5 to $30.0{\mu}M$ with a limit of detection of 56.4 nM. The impact of potential interfering agents was also studied. The electrode displayed wide advantages such as simple sample preparation, appreciable repeatability, reproducibility and also high sensitivity. Furthermore, the feasibility of the proposed method was successfully demonstrated by determining PAH in the spiked human biological sample.