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Information × Registration Number 0217U001246, 0116U000836 , R & D reports Title New tools, media and reagents for sample preparation and development of the new methods of analysis of environmental and technical objects popup.stage_title Head Urchenko Oleg, Registration Date 01-02-2017 Organization Kharkov National University named after V.N. Karazin popup.description2 Object of investigation. Improvement of precision, accuracy, selectivity of the charge for obtaining of mixed strontium halides, polymer sorption materials, determination of toxicant admixtures in multicomponent systems, methods of deoxidization of chloride melts in reactive gas medium. Subject of investigation. The preparation of multifunctional standard samples of composition for spectroscopic methods of analysis, conditions of obtaining polymer sorbents with different degree of cross-linkage, the dependence of physical characteristics of polymeric sorption materials on synthesis conditions, the use of ultrasound for intensification of sample preparation, single crystals of mixed alkali and alkaline earth halides activated with Eu2+. The purpose of the investigation. The development of theoretical bases, means and media, methods of production of polymeric sorption materials for extraction of lanthanides for water solutions, intensification of sample preparation, the development of routine of obtaining and preliminary purification of mixed melts based on potassium and strontium chlorides. Methods. Atomic absorption spectroscopy (AAS), atomic emission spectrometry with inductive coupled plasma (AES-ICP), X-ray fluorescent analysis (XFA), potentiometry, treatment using ultrasound, titrimetric methods, sonoluminescent spectroscopy. Obtained results and their novelty: - ?-diketonates of metals comparing with earlier analogs are found to have considerable advantage for the case of their use as standard composition samples for AAS, AES-ICP and XFA; - the possibility of performing calibration in water-based and organic liquids, with the use of the said ?-diketonate samples in solid state and in solutions; - the detection limits of metals in multicomponent systems containing complexes of the said metals with organic ligands were developed using the proposed approaches. The accuracy, precision and expressivity of the analyses were provided; - new approaches for the obtaining of sorbents based on polymeric matrixes with incorporated inorganic micro- and nanoparticles as sorption materials for removal of the rare-earth elements from aqueous solution; - theoretical bases concerning simultaneous action of low- and high-frequency ultrasound in processes of sample preparation; dissolution, intensification of acidic mineralization in food materials, sorption, admixture concentration are developed and necessary practical recommendations are formulated; - the temperature dependence of magnesium oxide solubility MgO in K2SrCl4 melt can be predicted on the basis of the Shreder-LeChatelier equation; - the affinity of K2SrCl4 melt to oxide ions at different temperatures was estimated; - kinetic parameters of carbohalogenation of K2SrCl4 with СCl4 vapor at different temperatures (reaction order, rate constants, activation energy) were determined; - a project of laboratory routine of synthesis and deoxidization of charge for obtaining single crystals based on mixed potassium and strontium chlorides activated with Eu2+ was developed. Product Description popup.authors Бакланов О. Бакланова Л. Брильова К. Буніна С. Ларін В. Леонова Н. Реброва Т. Титова Н. Чегренець В. Черножук Т. Юрченко О. popup.nrat_date 2020-04-02 Close