Results 261 to 270 of about 36,758 (301)
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Isothermal retention indices on poly(3-cyanopropylmethylsiloxane) stationary phases
Journal of Chromatography A, 2009Experimental isothermal retention indices (I) at 348, 363, 378 and 393 K of 52 solutes of varied polarity on seven different poly(cyanopropylmethylsiloxane) stationary phases with cyanopropyl group percentages between 0% and 75% have been determined by a well-proven, accurate method.
Ana María, Tello +3 more
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Retention process in reversed phase TLC systems with polar bonded stationary phases
Journal of Separation Science, 2005AbstractThe 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 +1 more
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Retention processes on α1-acid glycoprotein-bonded stationary phase
Journal of Chromatography A, 1992Stereoselective 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
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On the Mechanism of Stationary Phase Retention in Rotating Coil Columns
Journal of Liquid Chromatography & Related Technologies, 1996A hypothesis of the mechanism of the retention of one (stationary) phase of a two-phase liquid system in a rotating coil column has been proposed. The balance of forces of different nature acting on the stationary phase retained in the coil column has been considered.
P. S. Fedotov +3 more
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Retention of retinoids on an aromatic stationary phase in reversed-phase liquid chromatography
Chromatographia, 1993The retention behaviour of retinoids, which are π-electron containing solutes, on a phenyl stationary phase was studied using mobile phases consisting of aqueous methanol (MeOH; 76–84 % v/v) and acetonitrile (ACN; 60–82% v/v) at five temperatures (40–60°C). Retention was increasingly affected in both mobile phases by temperature and molecular structure
M. Salo, S. Herrala
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Retention of stevioside polar compounds on a sulfonic acid-functionalized stationary phase
Journal of Chromatography A, 2020To explore the retention and separation of stevioside polar compounds on a sulfonic acid-functionalized cation exchange column, the effects of different organic solvent-water mobile phases on the retention behavior of polar rebaudioside A (RA) and its analogues on the column were investigated over a wide range of organic solvent contents.
Rong Li +4 more
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Journal of Chromatography B, 2017
The main goal of our work was to apply three different phenyl-bonded stationary phases in ion pair chromatography for the analysis of synthetic oligonucleotides of various sequences. The influence of the stationary phase structure and the impact of ion-pairing reagent concentration on the retention of oligonucleotides were tested.
Sylwia, Studzińska +3 more
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The main goal of our work was to apply three different phenyl-bonded stationary phases in ion pair chromatography for the analysis of synthetic oligonucleotides of various sequences. The influence of the stationary phase structure and the impact of ion-pairing reagent concentration on the retention of oligonucleotides were tested.
Sylwia, Studzińska +3 more
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Gas chromatographic retention of alkyl phosphates on ionic liquid stationary phases
Journal of Chromatography A, 2013Retention behaviors of alkyl phosophates were studied on a series of ionic liquid gas chromatography columns. The selectivity of the IL columns for alkyl phosphates were compared with a 5% phenyl column as a route to evaluating the potential use of IL columns in the analysis of alkyl phosphates in petroleum samples in both one- and multi-dimensional GC.
Brandon M, Weber, James J, Harynuk
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Journal of Separation Science, 2010
AbstractEstrogens and estrogen metabolites are important biological mediators of the endocrine system. They have also been implicated in detrimental carcinogenesis and beneficial neuroprotective processes. The retention behavior of estrogen metabolites was investigated on five polar stationary phases, used for hydrophilic interaction chromatography ...
Hien P, Nguyen +4 more
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AbstractEstrogens and estrogen metabolites are important biological mediators of the endocrine system. They have also been implicated in detrimental carcinogenesis and beneficial neuroprotective processes. The retention behavior of estrogen metabolites was investigated on five polar stationary phases, used for hydrophilic interaction chromatography ...
Hien P, Nguyen +4 more
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Analytical Chemistry, 2001
A biotinylated-DNA aptamer (molecular weight 16,600) that binds adenosine and related compounds in solution was immobilized by reaction with streptavidin, which had been covalently attached to porous chromatographic supports. The aptamer medium was packed into fused-silica capillaries (50-150-microm i.d.) to form affinity chromatography columns ...
Q, Deng +3 more
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A biotinylated-DNA aptamer (molecular weight 16,600) that binds adenosine and related compounds in solution was immobilized by reaction with streptavidin, which had been covalently attached to porous chromatographic supports. The aptamer medium was packed into fused-silica capillaries (50-150-microm i.d.) to form affinity chromatography columns ...
Q, Deng +3 more
openaire +2 more sources