Перегляд за Автор "Kostenko, Elizaveta"
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Документ Extraction-sorption concentrating and next photometric definition of some biologically active compounds(1992) Shtokalo, Miroslava; Kostenko, ElizavetaThe conditions of the immobilization dyes at the surface КУ-28 were found. The interaction of organic materials with the surface reagents was studied. The optimum conditions of the reactions, quantitative characteristics of the composition and the surface compounds stability; the effective dates of the modified sorbents have been obtained. A new solid-phase spectrophotometric procedures was developed for determination of the organic materials organic materials in the objects.Документ He use of sulphophtalein dyes immobilized on anionite AB-17x8 to determine the contents of Pb(II), Cu(II), Hg(II) and Zn(II) in liquid medium(2017) Kostenko, Elizaveta; Melnyk, Lyudmila; Matko, Svetlana; Malovanyy, MiroslavThe conditions of the immobilization of xylenol orange, methylthymol blue, pyrocatechol violet, and chromazurol S at the surface of AB-17×8 anionite were studied. The interaction of Cu(II), Pb(II), Zn(II), Hg(II) ions with obtained solid-phase reagents was investigated. The efficiency of the purification of apple juice with such natural adsorbent of Cherkasy deposits (Ukraine) as palygorskite was studied. The optimum conditions of the reactions, quantitative characteristics of the composition and the surface compound stability, the efficiency of the anion exchanger with the immobilized sulphophthalein dyes were determined.Документ Monitoring for nitrates in vegetables and potable water(2013) Ganchuk, Victoria; Kostenko, Elizaveta; Butenko, OlenaThe Presented results of the determination nitrate in vegetable and fruit, which have grown in 2009 different producers. The question of the influence of the weather conditions is Discussed on contents nitrate in vegetable product. Recommendations are Given on reduction amount nitrate in vegetable and fruit of the product.Документ Monitoring of nitrites in sausage products(2013) Kostenko, Elizaveta; Butenko, Olena; Ganchuk, VictoriaThe Presented results photometric determinations nitrite in sausage product from different producers.Документ Solid phase spectrophotometric determination of copper (II) using SPADNS(2003) Kostenko, ElizavetaThe interaction of Cu (II) with SPADNS in the solid-phase was studied. The optimum conditions of the reaction and the composition of complex that is formed at the surface were found, and a scheme was proposed for the interaction at the phase boundary. A solid-phase spectrophotometric procedur was developed for determination of Cu (II).Документ The modificated by the dye polimeric ionites in the hybrid spectroscopic methods of analysis(2005) Kostenko, ElizavetaThe conditions of the immobilization dyes at the surface АВ-178 and КУ-28 were found. The interaction of Cu (II), Pb (II), Zn (II), Hg (II), Fe (III), Sn (IV), Zr (IV), Ti (IV) with the surface reagents was studied. The optimum conditions of the reactions, quantitative characteristics of the composition and the surface compounds stability; the effective dates of the modified sorbents have been obtained. A new solid-phase spectrophotometric procedures was developed for determination of the metal iones in the food objects.Визначені умови іммобілізації барвників на поверхні АВ-178 та КУ-28. Досліджена взаємодія Cu (II), Pb (II), Zn (II), Hg (II), Fe (III), Sn (IV), Zr (IV), Ti (IV) з отриманими твердофазними реагентами. Визначені: оптимальні умови реакцій, кількісні характеристики складу і стійкості поверхневих комплексів; показники ефективності іонообмінників з іммобілізованими барвниками. Розроблений ряд нових твердофазно-спектрофотометричних методик визначення металів у харчових об´єктах. Установлены условия иммобилизации красителей на поверхности АВ-178 и КУ-28. Изучено взаимодействие Cu (II), Pb (II), Zn (II), Hg (II), Fe (III), Sn (IV), Zr (IV), Ti (IV) с полученными твердофазными реагентами. Определены: оптимальные условия реакций, количественные характеристики состава и прочности образующихся на поверхности комплексов; показатели эффективности ионообменников с иммобилизованными красителями. Разработан ряд новых твердофазно-спектрофотометрических методик для определения ионов металлов в пищевых объектах.Документ The study of zirconium and hafnium complexes with pyrazolon derivatives and their use in analysis(1982) Shtokalo, Miroslava; Kostenko, Elizaveta; Ostrovska, Mira; Rizhenko, VictoriaThe optimum conditions of the reaction and the composition of complexes that is formed were found. The complexformation constants were calculated. The Offered scheme of the interaction in systems. Offered methodses of the determination metals.Документ The use of interface spectrophotometric in quality control and examination of foodstuffs and raw materials(2013) Kostenko, ElizavetaThe conditions of the immobilization dyes at the surface АВ-178 and КУ-28 were found. The interaction of Cu (II), Pb (II), Zn (II), Hg (II), Fe (III), Sn (IV), Zr (IV), Ti (IV) with the surface reagents was studied. The optimum conditions of the reactions, quantitative characteristics of the composition and the surface compounds stability; the effective dates of the modified sorbents have been obtained. A new solid-phase spectrophotometric procedures was developed for determination of the metal iones in the food objects. Визначені умови іммобілізації барвників на поверхні АВ-178 та КУ-28. Досліджена взаємодія Cu (II), Pb (II), Zn (II), Hg (II), Fe (III), Sn (IV), Zr (IV), Ti (IV) з отриманими твердофазними реагентами. Визначені: оптимальні умови реакцій, кількісні характеристики складу і стійкості поверхневих комплексів; показники ефективності іонообмінників з іммобілізованими барвниками. Розроблений ряд нових твердофазно-спектрофотометричних методик визначення металів у харчових об´єктах.