Results 31 to 40 of about 309,298 (344)

Photografted methacrylate-based monolithic columns coated with cellulose tris(3,5-dimethylphenylcarbamate) for chiral separation in CEC [PDF]

, 2018
A chiral capillary monolithic column for enantiomer separation in capillary electrochromatography was prepared by coating cellulose tris(3,5-dimethylphenylcarbamate) on porous glycidyl methacrylate-co-ethylene dimethacrylate monolith in capillary format ...
Al-Othman, Carrasco-Correa, Carrasco-Correa, Carrasco-Correa, Castells, Chankvetadze, Chankvetadze, Chen, Connolly, Connolly, Currivan, Dixit, Dong, Eeltink, Fanali, Fanali, Girod, Guerrouache, He, Hernández-Borges, Hilder, Huang, Hödl, Ling, Lv, Lämmerhofer, Meyring, Ou, Peters, Peters, Preinerstorfer, Preinerstorfer, Pucci, Qin, Qin, Rohr, Schmid, Stachowiak, Stachowiak, Tian, Vonk, Wu, Zheng   +42 more
core   +1 more source

The thermodynamic study of morpholinium 2-((4-(2-methoxyphenyl)-5-(pyridinyl)-4H-1,2,4-triazol-3-yl)thio)acetate and its technological impurities in hydrophilic chromatography

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
doaj   +1 more source

Gas-chromatographic analysis of sugars and related hydroxy acids as acyclic oxime and ester trimethylsilyl derivatives [PDF]

, 1974
A g.l.c. method which makes possible the simultaneous analysis of the common types of acidic and neutral sugars is described. Particular advantages are achieved with hydroxy acids, ketoses, and uronic acids.
Petersson, Göran
core   +1 more source

Determination of thermodynamic parameters of morpholinium 2-(5-(pyridinyl)-1,2,4-triazole-3-ylthio)acetate and its impurities in conditions of reverse phase chromatography

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
doaj   +1 more source

Development and Validation of Retention Models in Supercritical Fluid Chromatography for Impregnation Process Design

Applied Sciences, 2021
The retention factor is the key quantity for the thermodynamic analysis of the retention mechanism in chromatographic experiments. In this work, we measure retention factors for moderately polar solutes on four silica-based porous matrices as stationary ...
Miaotian Sun, Zeynep Ülker, Zhixing Chen, Sivaraman Deeptanshu, Monika Johannsen, Can Erkey, Pavel Gurikov   +6 more
doaj   +1 more source

Comparison of Various Chromatographic Systems for Identification of Vortioxetine in Bulk Drug Substance, Human Serum, Saliva, and Urine Samples by HPLC-DAD and LC-QTOF-MS

Molecules, 2020
Background: Determination of psychotropic drugs in clinical study is significant, and the establishment of methodologies for these drugs in biological matrices is essential for patients’ safety.
Anna Petruczynik, Karol Wróblewski, Krzysztof Wojtanowski, Tomasz Mroczek, Dariusz Juchnowicz, Hanna Karakuła-Juchnowicz, Tomasz Tuzimski   +6 more
doaj   +1 more source

A rapid stability-indicating, fused-core HPLC method for simultaneous determination of β-artemether and lumefantrine in anti-malarial fixed dose combination products [PDF]

, 2013
Background: Artemisinin-based fixed dose combination (FDC) products are recommended by World Health Organization (WHO) as a first-line treatment. However, the current artemisinin FDC products, such as beta-artemether and lumefantrine, are inherently ...
Bracke, Nathalie, Burvenich, Christian, D'Hondt, Matthias, De Spiegeleer, Bart, Duchateau, Luc, Peremans, Kathelijne, Vandercruyssen, Kirsten, Wega, Sultan Suleman, Wynendaele, Evelien   +8 more
core   +2 more sources

Silica-Based Stationary Phase with Surface Bound N-Acetyl-glucosamine for Hydrophilic Interaction Liquid Chromatography

Molecules, 2023
A hydrophilic silica-based stationary phase with surface bound N-acetylglucosamine (GlcNAc-silica) was prepared in house and characterized physically via Fourier transform infrared (FTIR) analysis and thermogravimetric analysis (TGA) and ...
Vaithilingam Rajendiran, Ziad El Rassi
doaj   +1 more source

Chemometric Study of Retention on Binary Stationary Phases in Gas Chromatography [PDF]

Journal of Chromatographic Science, 2012
Using gas chromatography, data analysis is performed on a dataset consisting of 486 retention indices, 27 standards (ramified alkanes, aliphatic alcohols, and aromatic compounds), 6 pure and binary stationary phases, and three temperatures. The behavior of the pure stationary phases (OV-3, OV-225, OV-61-OH, and OV-1701-OH) and the binary stationary ...
S, Bouzouane, M, Righezza, A, Touabet
openaire   +2 more sources

Prediction of Bleeding via Simulation of Hydrodynamics in Centrifugal Partition Chromatography

Separations
Centrifugal Partition Chromatography (CPC) utilizes a two-phase liquid–liquid system as mobile and stationary phases. During operation, the latter continuously drains out of the rotor, despite it being in fact stationary, leading to decreasing separation
Felix Buthmann, Sophia Volpert, Jörg Koop, Gerhard Schembecker   +3 more
doaj   +1 more source