Daria I. Tishkevich; Sergey S. Grabchikov; Stanislav B. Lastovskii; Dzmitry V. Yakimchuk; Denis A. Vinnik; Alla I. Vorobjova; Tatiana I. Zubar; Alex V. Trukhanov
Abstract
Currently, medicine uses a large number of devices and sources of ionizing radiation, which have a dangerous effect on workers in medical diagnostic rooms and patients. Human organs are very sensitive to the damaging effects of radiation. The commonly used material for radiation protection proposes is ...
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Currently, medicine uses a large number of devices and sources of ionizing radiation, which have a dangerous effect on workers in medical diagnostic rooms and patients. Human organs are very sensitive to the damaging effects of radiation. The commonly used material for radiation protection proposes is lead. In recent years, bismuth deposition has become an interesting subject for the electrochemical community because of its unique properties. There are a limited number of authors dealing with Bi films onto metallic substrates by electrochemical deposition. The conditions of Bi electrodeposition and the structure of Bi coatings were examined. The shielding efficiency of Bi coatings under electron irradiation with 1,6–1,8 MeV was measured. The electron beam attenuation coefficient was estimated by the changing of current-voltage characteristics of semiconductor test structures which were located with and without shields. It has been determined that optimal shielding efficiency and mass-dimensional parameters have Bi shields with 2 g/cm 2 mass thickness and 156 shielding efficiency.
Jie Cai; Xiaozhou Zhou; Yuanqiang Tu; Guanwen Feng; Chunyan Huang
Abstract
A sensitive electrochemical sensor for detection of sudan was developed based on solid-phase extraction (SPE) at bismuth-film modified glassy carbon electrode. SPE of sudan may be due to the physical adsorption between sudan and the bismuth film. The properties of the bismuth-film electrode (BiFE) designed ...
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A sensitive electrochemical sensor for detection of sudan was developed based on solid-phase extraction (SPE) at bismuth-film modified glassy carbon electrode. SPE of sudan may be due to the physical adsorption between sudan and the bismuth film. The properties of the bismuth-film electrode (BiFE) designed for detection Sudan were examined by scanning electron microscopy (SEM), electrochemical impedance and voltammetry. The various bismuth plating solutions containing Cl-, Br- and I- respectively, were tested in bismuth-film generation. It has been found that the plating solution only containing Br- ensures the finest quality bismuth film for analytical purposes. Other operational parameters such as extraction time, pH of the electrolytic and sample solution, and co-solvents have been optimized. Under the optimum experimental conditions, the stripping voltammetric response was proportional to the concentration of sudan ranging from 0.1 to 10 M. The detection limit was 0.05 M.
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