Oleg Yurchenko

Oleg Yurchenko
V. N. Karazin Kharkiv National University · chemical metrology

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19
Publications
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48
Citations

Publications

Publications (19)
Article
The paper reports results of pure CsMgCl3 and CsMgCl3:xEu2+ (x = 0.5, 1 and 1.5 mol. %, in the charge) single crystals growth and investigations of their functional properties. The crystals were grown by Bridgman method and the entry ratio of Eu2+ into CsMgCl3 was determined as 0.021, i.e. in all the europium-activated samples the concentration of...
Article
Complete extraction of analytes from samples and the homogeneity of analyzed solutions were achieved using ultrasonic treatment (20 minutes). The sensitivity, precision, and accuracy of atomic absorption determination of analytes were improved by using Triton X-100 (4%) and calibration solutions based on iron and manganese acetylacetonates. It was...
Article
The effect of Triton X-100 surface-active substance on the value of the analytical signal during the atomic absorption determination of copper and zinc was studied. It was shown that the maximum value of the analytical signal in the determination of analytes is achieved when Triton X-100 is used at a mass fraction of 5%. The sensitivity of the atom...
Article
The purpose of the work was to determine the optimal conditions for preparation of chemically pure salts of ammonium orthophosphates based on solutions formed after purification of extractable orthophosphoric acid from toxic impurities of d-metals, lead, arsenic and fluorine by their coprecipitation with calcium hydrogen phosphate. Based on the Sec...
Article
The dependences of the sonoluminescence intensity of cesium, lithium, and sodium in aqueous solutions of their salts at concentrations of 400–600 g/L on the ultrasound frequency and intensity were studied. Techniques for sonoluminescence determination of cesium, lithium, and sodium in highly concentrated solutions were developed using aqueous solut...
Article
A comparative study of carbochlorination processes (treatment with CCl4 vapor in argon flow) of K2SrCl4 melt and K2SrCl4+Eu2O3,solid mixture at 973 K was performed by the potentiometric method with the use of Pt(O2)|ZrO2(Y2O3) membrane oxygen electrode as reversible to oxide ion. Solid Eu2O3 interacts with K2SrCl4 melt that results in partial trans...
Article
A comparative investigation of a complex process of the interaction between CCl4 vapor and oxide ions O2– (carbochlorination) in K2SrCl4 and KSr2Cl5 melts at 973 K was performed by the potentiometric method using Pt(O2)|ZrO2(Y2O3) membrane oxygen electrode as reversible to oxide ion. The analysis of the limiting stages of this process was made on t...
Article
Experimental data on solubility of magnesium oxide in melts based on mixed chlorides of alkali and alkaline earth metal are complemented by investigation in SrCl2-rich melt of KSr2Cl5 composition. The changes of MgO solubility in the chloride melts based on CaCl2 and SrCl2 at melt temperature variation obeys to predictions of the Shreder-Le Chateli...
Article
The course of deoxidization (removal of oxide ions) of molten K2SrCl4 using tetrachloromethane vapor was investigated by a potentiometric method using Pt(O2)|YSZ oxygen electrode for the detection of current (equilibrium) oxide ion concentration. The course of the chemical stage of the ‘CCl4–O²⁻’ interaction in the studied melt at 923, 973 and 1023...
Article
The sonoluminescence intensity of Cs, Ru, K, Na, Li, Sr, In, Ga, Ca, Th, Cr, Pb, Mn, Ag, and Mg salts in aqueous solutions of various concentrations was investigated as a function of ultrasound frequency and intensity. Techniques for the determination of these elements in solutions of table salt and their own salts were developed. It was shown that...
Article
Full-text available
It is shown that chromium(III) acetylacetonate meets the requirements of calibration reference materials: it is homogeneous, soluble in water and organic solvents, and its solutions are stable. Chromium(III) acetylacetonate has been successfully used as a calibration reference material in the analysis of chromium in iron-base alloys. The procedure...

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