Electrocatalytic oxidation and selective voltammetric detection of methyldopa in the presence of hydrochlorothiazide in real samples

The combination of methyldopa and hydrocholorothiazide are used to treat high blood pressure. The present research dealt with the synthesis and utilization of the hexagonal-shaped of ZnO nanoparticles (NPs) to develop a new, sensitive, and exclusive electrochemical sensor for detection of methyldopa. Thus, we did our examination on the methyldopa detection via cyclic voltammetry (CV) method, differential pulse voltammetry (DPV) technique, and chronoamperometry (CH) at molybdenum (VI) complex-ionic liquid�ZnO NP modified carbon paste electrode (MCILZNMCPE) in 0.1 M PBS (pH of 7.0) solution. The use of DPV showed linear dependence of methyldopa peak current at pH of 7.0 solution on their concentration ranging between 0.05 and 300.0 µM. Then, limit of detection (LOD) has been determined to be 20.0 nM for methyldopa. Ultimately, the modified electrode has been utilized for detecting methyldopa in the presence of hydrochlorothiazide by DPV. © 2020 Elsevier B.V

Recent developments in conducting polymers: Applications for electrochemistry

Scientists have categorized conductive polymers as materials having strongly reversible redox behavior and uncommon combined features of plastics and metal. Because of their multifunctional characteristics, e.g., simplistic synthesis, acceptable environmental stability, beneficial optical, electronic, and mechanical features, researchers have largely considered them for diverse applications. Therefore, their capability of catalyzing several electrode reactions has been introduced as one of their significant features. A thin layer of the conducting polymer deposited on the substrate electrode surface can augment the electrode process kinetics of several solution species. Such electrocatalytic procedures with modified conducting polymer electrodes can create beneficial utilization in diverse fields of applied electrochemistry. This review article explores typical recent applications of conductive polymers (2016-2020) as active electrode materials for energy storage applications, electrochemical sensing, and conversion fields such as electrochemical supercapacitors, lithium-ion batteries, fuel cells, and solar cells. This journal is © The Royal Society of Chemistry

Fabrication of magnetic iron oxide-supported copper oxide nanoparticles (Fe3O4/CuO): Modified screen-printed electrode for electrochemical studies and detection of desipramine

The present investigation examines a sensitive electrochemical technique to detect desipramine through Fe3O4/CuO nanoparticles (NPs). Fe3O4/CuO NPs were synthesized via a coprecipitation procedure, and the products were characterized via energy disperse spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and vibrating sample magnetometer. The voltage-current curve and differential pulse voltammetry examinations of Fe3O4/CuO-modified screen-printed electrode (Fe3O4/CuO/SPE) were followed by the determination of electro-catalytic activities toward desipramine oxidation in a phosphate buffer solution (pH = 7.0). In addition, the value of diffusion coefficient (D = 3.0 � 10-6 cm2 s-1) for desipramine was calculated. Then, based on the optimum conditions, it was observed that the currents of the oxidation peak were linearly proportionate to the concentration of desipramine in the broad range between 0.08 and 400.0 μM and LOD of 0.03 μM (S/N = 3). Finally, our new sensor was successfully utilized to detect desipramine in the real samples, with reasonable recovery in the range of 97.2 to 102.7. This journal is © 2020 The Royal Society of Chemistry

Iron molybdenum oxide-modified screen-printed electrode: Application for electrocatalytic oxidation of cabergoline

This research designed a simplified, sensitive electro-chemical procedure to detect cabergoline by a means of a screen-priented electrode (SPE) modified with Fe2MoO6 magnetic nanocomposite (Fe2MoO6/SPE). Fe2MoO6 magnetic nano-composite has been procured through a simplified procedure. According to the analyses, the final nanocomposite has been described by XRD, EDS, TEM, SEM and VSM analysis. The prepared modified electrode exhibited greater peak currents to oxidize cabergoline than that of the unmodified SPE. The analytical curve for the determination of cabergoline had very good linear response in the range between 0.08 and 300.0 µM for cabergoline. The detection limit for determining cabergoline was 0.02 µM. Finally, our technique has been substantially utilized for detecting cabergoline in the real samples. © 2020 Elsevier B.V