This paper presents a potentiostat readout circuit with low-noise and mismatch-tolerant current mirror using chopper stabilization dynamic element matching (DEM) for electrochemical sensors. Current-mode sensors are widely used to detect the blood glucose viruses in diagnosis of various diseases such as diabetes, hyperlipidemia, H5N1 avian influenza virus (AIV). Low-noise characteristics essent...

316L stainless steel is the most commonly used metallic material in the manufacture of orthopedic implants. To achive better properties metal implants often coated with biocomposites. A sol–gel method was used for coating of Poly lactic acid (PLA)/Hydroxyapatite nanopowder (nHA) on stainless steel 316L substrate. The X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) wer...

Abstract This review focuses on monitoring selected organic contaminants utilising an electrochemistry technique due to intrinsic benefits such as simplicity, portability, cost, and improved sensitivity. Because the presence of pollutants in water causes a variety health issues tumour, headaches, tiredness, developmental abnormalities, it is critical explore effective approach quantifying these...

Toxic metal contamination of the environment is a global issue. In this paper, we present a low-cost and rapid production of amalgam electrodes used for determination of Cd(II) and Pb(II) in environmental samples (soils and wastewaters) by on-site analysis using difference pulse voltammetry. Changes in the electrochemical signals were recorded with a miniaturized potentiostat (width: 80 mm, dep...

Abstract Our study is focused on identification of the best medium for future experiments information processing with Belousov–Zhabotinsky reaction proceeding in Dowex beads immobilized catalyst inside. The optimum should be characterized by long and stable nonlinear behavior, mechanical stability allow control electric potential. We considered different types ion-exchange resins, bead distribu...

This research has presented a solution to the problem faced by alloys: corrosion problem, reducing and enhancing protection using an inhibitor (Schiff base). The base) was synthesized reacting of substrates materials (4-dimethylaminobenzaldehyde 4-aminoantipyrine). It diagnosed infrared technology IR, where IR spectrum through visible beams proved that Schiff base well formed with high purity. ...

The study comprises evaluation of suitability of passive layer created on the surface of AISI 316L stainless steel for products that are intended to have contact with blood. For that purpose, prior to and after chemical passivation, samples were subject to 7 day exposure in artificial plasma at the temperature of T=37°C. Next, tests of metallic ions infiltration from the surface to the solution...

In this paper a system is described for impedance measurements in electrochemical cells, integrated by a fast potentiostat, signal generator, digital transient recorder and a computer interface. The treatment of the signal is made by obtaining the correlation between the response cell signal with the in-phase and in-quadrature signals, as is made in the frequency response analysis systems, but ...

In this work we report on the design, microfabrication and analytical performances of a new electrochemical sensor array (ESA) which allows for the first time the simultaneous amperometric detection of nitric oxide (NO) and peroxynitrite (ONOO(-)), two biologically relevant molecules. The on-chip device includes individually addressable sets of gold ultramicroelectrodes (UMEs) of 50 µm diameter...