Results 31 to 40 of about 5,042,699 (188)
Separation and lipophilicity of some new steroid derivatives in normal- and reversed-phase high performance liquid chromatography [PDF]
Chemical Industry and Chemical Engineering Quarterly, 2011 The separation ability and retention of normal and reversed phase HPLC with, respectively, three non-polar and two polar mobile phases, have been studied by measuring the retention constants of a series of newly synthesized estrone derivatives.
Ačanski Marijana M. +2 more
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Normal and reversed phase thin-layer chromatography of new 16,17-secoestrone derivatives [PDF]
Journal of the Serbian Chemical Society, 2003 The retention behaviour and separation ability of a series of new 16,17-secoestrone derivatives has been studied on silica gel, alumina and C-18 silica gel layers with non-aqueous and aqueous-organic mobile phases.
SUZANA JOVANOVIC-SANTA +2 more
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Separations, 2023 A novel ZIF-8 assisted polyacrylamide functionalized silica polar stationary phase was prepared by a facile method of adding ZIF-8 nanoparticles and silica into polyacrylamide (PAM) aqueous solution, and then stirring the mixture until the solution was ...
Tong Zhang +5 more
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Acta Chimica Slovenica, 2019 There are several different approaches for LC method development; beside traditional, different software programs for method development and optimization are available.
Tina Snoj Ekmečič, Irena Kralj Cigic
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The application of the extended thermodynamic approach to describe the effect of counterions, both of chaotropic agents and ionic strength modifiers, on the retention behavior of protonated basic analytes in chaotropic chromatography [PDF]
Arhiv za farmacijuIn this study, the extended thermodynamic approach was used to quantitatively explain the effect of counterions, both of chaotropic agents and ionic strength modifiers, in variable (vI) and constant ionic strength (cI) systems on the retention behavior ...
Gkountanas Kostas +4 more
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Separation Of Methionine Enantiomers By Using Teicoplanin And Cyclofructan Columns
Nova Biotechnologica et Chimica, 2015 Methionine is a naturally occurring amino acid. Its enantiomeric separation by using high performance liquid chromatography on various types of chiral stationary phases was studied.
Hroboňová Katarína +5 more
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Fabrication of naphthol-based phenolic polymer coated-silica for mixed-mode chromatography
Journal of Chromatography Open, 2022 This paper introduces a novel phenolic resin-coated silica stationary phase grafted from the surface of amino-functionalized porous silica microspheres through copolymerization of 1,5-dihydroxynaphthalene and 1,3,5-trioxane in the dispersed state ...
Yongxing Hu +2 more
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Isothermal retention indices on poly(3,3,3-trifluoropropylmethylsiloxane) stationary phases
Journal of Chromatography A, 2007 Isothermal retention indices (I) of 56 solutes of varied chemical nature and polarity were determined by a well-proven accurate method on poly(3,3,3-trifluoropropylmethylsiloxanes) with trifluoropropyl group percentages between 0 and 50% within the 353-413 K temperature range.
Lebrón-Aguilar, Rosa +3 more
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Журнал органічної та фармацевтичної хімії, 2020 Aim. To study the dependence of the retention of morpholinium 2-((4-(2-methoxyphenyl)-5-(pyridinyl)-4H-1,2,4-triazol-3-yl)thio)acetate and its technological impurities on temperature, as well as determine the thermodynamic characteristics of the transfer
B. O. Varynskyi
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Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2020 The study of thermodynamic retention parameters helps to optimize the separation process in chromatography, and it is also possible to detrmine the nature of the interaction of analyts with the stationary phase.
B. O. Varynskyi
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