Results 271 to 280 of about 309,298 (344)

Retention processes on α1-acid glycoprotein-bonded stationary phase

Journal of Chromatography A, 1992
Stereoselective separations of charged enantiomers on CHIRAL-AGP can be controlled by varying the pH and adding charged and uncharged additives to the mobile phase. The interaction with the selector, alpha 1-acid glycoprotein, was studied by monitoring the effects of the variables on retention and by indirect detection, in part using a simple ...
E, Arvidsson, S O, Jansson, G, Schill
openaire   +2 more sources

First deep eutectic solvent-based (DES) stationary phase for gas chromatography and future perspectives for DES application in separation techniques.

Journal of Chromatography A, 2020
The paper presents the first application of deep eutectic solvents (DES) as stationary phases for gas chromatography. DES obtained by mixing tetrabutylammonium chloride (TBAC) as a hydrogen bond acceptor (HBA) with heptadecanoic acid being a hydrogen ...
Malwina Momotko, J. Łuczak, A. Przyjazny, Grzegorz Boczkaj   +3 more
semanticscholar   +1 more source

Ionic liquid functionalized β-cyclodextrin and C18 mixed-mode stationary phase with achiral and chiral separation functions.

Journal of Chromatography A, 2020
A novel reversed-phase/hydrophilic interaction/ion-exchange (RPLC/HILIC/IEC) and chiral recognition mixed-mode stationary phase material was synthesized using 3-n-octadecyl-1-vinylimidazolium bromide and 6-(1-allylimidazolium)-cyclodextrin tosylate as ...
Jingqiu Zhou, Xiujun Ren, Qiurong Luo, Die Gao, Qifeng Fu, Di Zhou, Fengjiao Zu, Zhining Xia, Lujun Wang   +8 more
semanticscholar   +1 more source

Retention process in reversed phase TLC systems with polar bonded stationary phases

Journal of Separation Science, 2005
AbstractThe retention of a solute in RP chromatography is a very complex process which depends on many factors. Therefore, the study of the influence of a mobile phase modifier concentration on the retention in different reversed phase chromatographic systems is very important for understanding the rules governing retention and mechanisms of substance ...
Wojciech, Zapała, Monika, Waksmundzka-Hajnos   +1 more
openaire   +2 more sources

Riboflavin binding protein—Chiral stationary phase: Investigation of retention mechanism

Chromatographia, 2002
The chiral recognition mechanism of Riboflavin Binding Protein (RfBP) stationary phase has been investigated by studying the influence of temperature on the retention process.
CALLERI, ENRICA, DE LORENZI, ERSILIA, MASSOLINI, GABRIELLA, SILUK D., MARKUSZEWSKI M., KALISZAN R.   +5 more
openaire   +2 more sources

Temperature effects on solute retention for hydride‐based stationary phases

Journal of Separation Science, 2007
AbstractThe effect of solute retention is investigated for two hydride‐based stationary phases: bidentate C18 and cholesterol. Several small molecules and peptides are used as solutes. In the reversed‐phase mode, most compounds have the expected temperature behavior, i. e. decreasing retention with increasing temperature.
Joseph J, Pesek, Maria T, Matyska, Milton T W, Hearn, Reinhard, Boysen   +3 more
openaire   +2 more sources

Retention behaviour of analytes in reversed phase high performance liquid chromatography - A review.

Biomedical chromotography, 2022
The understanding of principles that drive the separation in reversed phase chromatography plays an important role in the prediction of elution of solutes in RP-HPLC. The separation in RP-HPLC is based on the principle of adsorption and partition.
G. V., P. P. Basuri, K. Sahini, N. C N
semanticscholar   +1 more source

Retention of Ions on Nonporous Charged Stationary Phases

Analytical Chemistry, 2000
The interactions between ion-exchange resins and counterions consist of several mechanisms, such as ion-pair formation between active sites and counterions, specific adsorption, solvation changes, and double-layer accumulation. The double-layer accumulation of ions, which is a typical nonstoichiometric mechanism, is an important factor governing ...
openaire   +2 more sources

Peptide retention time prediction in hydrophilic interaction liquid chromatography: Zwitter-ionic sulfoalkylbetaine and phosphorylcholine stationary phases.

Journal of Chromatography A, 2020
Peptide retention time prediction models have been developed for zwitter-ionic ZIC-HILIC and ZIC-cHILIC stationary phases (pH 4.5 eluents) using proteomics-derived retention datasets of ~30 thousand tryptic peptides each. Overall, hydrophilicity of these
Darien Yeung, Nicole Klaassen, Benilde Mizero, V. Spicer, O. Krokhin   +4 more
semanticscholar   +1 more source

Evaluation of temperature and pressure effects on retention in supercritical fluid chromatography on polar stationary phases.

Journal of Chromatography A, 2020
Four polar stationary phases (ethylene-bridged hybrid silica, cyanopropyl, 2-ethylpyridine, and zwitterionic sulfobetaine) have been characterized in supercritical fluid chromatography (SFC) by linear free energy relationships (LFER) method with an ...
D. Ovchinnikov, O. Pokrovskiy, D. Kosyakov, K. Bogolitsyn, N. V. Ul’yanovskii, D. Falev   +5 more
semanticscholar   +1 more source