Modern gas analysis requires an integrated approach to ensure the necessary metrological characteristics and achieve high reliability of detection. A new algorithm for multisensor systems based on synthesized domestic materials possessing semiconductor properties has been developed for the analysis of a wide range of gases of metallurgical industries. The use of gas-sensitive elements made of semiconductor material with n-type conductivity allows solving the main task of modern gas analysis – detection of vapors and gases of a wide range with high stability, necessary selectivity and sensitivity. Due to the developed surface structure formed from polycrystals 3-10 nm in size, semiconductor sensors allow to detect various substances in air in a wide range of concentrations: from trace amounts of 10 -6 -10 -5 mg/m 3 to high 500-800 mg/m 3 . Increase of the selectivity of the sensors is facilitated by the introduction of catalysts into the gas-sensitive layer of doping impurities. The formation of multisensory systems increases degrees of freedom, expanding the range of identification of the analytes. In addition to solving the analytical task of forming gas sensitive elements, digital circuit and aerodynamic solutions have been developed that meet the requirements of gas analysis in a wide range of impurity concentrations and application conditions.
Technical and technological state of the modern industrial enterprises, ecological situation, danger of terroristic acts, require developing of modern means of the environment parameters monitoring. The article presents the system of indication and monitoring of atmospheric air, meeting the requirements of speed, selectivity, portability and autonomy, resistance to influence of external factors of various nature, intended to solve of the specified problem.
The article dedicates to the problem of control of structure of technological solution of productions cycle in the mining factory, we described different photometrical methods of determination its structure. For rise and stability of equation of connection we can suggest to realize logometrical principle with fast difference of optical base in factory of photometrical analysators and the opportunity to change long of waves of emanation. You can see the scheme of work this factory and results of dimension.
This report considers the problem of analyzing the concentration of suspended particles in dispersed media and the concentration of components in regular solutions. The logometric method recommended by the Metallurgical Faculty of the St. Petersburg Mining Institute allows to solve this problem and increase the efficiency of process control in the mining and metallurgical industry without complicating the analytical system.
The article describes the theoretical basis of the high-frequency effect of increasing the mobility of ions in aqueous solutions under the action of an electric field and the possibilities of adapting this effect to the sorption treatment of wastewater and technical solutions.
