Results 291 to 300 of about 309,298 (344)

Preparation and evaluation of a reversed-phase/hydrophilic interaction/ion-exchange mixed-mode chromatographic stationary phase functionalized with dopamine-based dendrimers.

Journal of Chromatography A, 2018
In this work, a novel dendritic stationary phase was synthesized by the repeated grafting of 1,4-butanediol diglycidyl ether (BDDE) and dopamine (DA) on the surface of silica for performing mixed-mode high-performance liquid chromatography (MHPLC ...
Di Zhou, Jing Zeng, Qifeng Fu, Die Gao, Kailian Zhang, Xiujun Ren, K. Zhou, Zhining Xia, Lujun Wang   +8 more
semanticscholar   +1 more source

Retention of stevioside polar compounds on a sulfonic acid-functionalized stationary phase

Journal of Chromatography A, 2020
To 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, Weijie Sun, Xia Xiao, Bin Chen, Yan Wei   +4 more
openaire   +2 more sources

Some observations regarding different retention properties of HPLC stationary phases

Chromatographia, 1988
The retention of 32 monocyclic aromatic compounds and 14 polynuclear aromatic hydrocarbons (PAHs) has been studied on four different bonded phases in each of two mobile phases. An additional data set of 21 monocyclic aromatics judiciously chosen for their well-established solvatochromic parameters, 12 PAHs and 12 polychlorinated biphenyls (containing ...
J. H. Park, P. W. Carr, M. H. Abraham, R. W. Taft, R. M. Doherty, M. J. Kamlet   +5 more
openaire   +1 more source

Redox-modulated solute retention on iron–protoporphyrin–silica stationary phases

Analytica Chimica Acta, 1999
Abstract Iron–protoporphyrin (FeProP)–silica phases suitable for immobilized metal ion affinity chromatography (IMAC) are examined with respect to the change in solute retention behavior induced by switching the redox state of the central metal ion from Fe(III) to Fe(II).
Ulrich Rüdel, Mark E. Meyerhoff
openaire   +1 more source

Characterisation of GC stationary phases in multilinear retention model

Chromatographia, 1998
Stationary phases are characterised in a multilinear retention model by retention data of a set of selected prototypical substances. Prototypical stationary phases confirm the application of prototypical substances in the retention model. For comparison, 27 stationary phases are characterized with solute descriptors of the solvation model. New adjusted
openaire   +1 more source

Surface-bonded amide-functionalized imidazolium ionic liquid as stationary phase for hydrophilic interaction liquid chromatography.

Journal of Chromatography A, 2017
The amide group modified silica materials are popular stationary phases for hydrophilic interaction liquid chromatography (HILIC). Meanwhile, surface-confined imidazolium ionic liquids (ILs) have been proved to be useful HILIC stationary phases and ...
Lizhen Qiao, Wangjie Lv, Mengmeng Chang, Xianzhe Shi, Guowang Xu   +4 more
semanticscholar   +1 more source

Retention of arsenic species on zwitterionic stationary phase in hydrophilic interaction chromatography

Journal of Separation Science, 2010
AbstractZwitterionic hydrophilic interaction chromatography (ZIC®‐HILIC) was used to study the retention of selected organoarsenicals. The retention behavior of nine organic arsenic species on ZIC®‐HILIC was investigated to elucidate which is the driving force for their separation, hydrophilic partitioning or adsorption driven by hydrogen bonds with ...
Dan, Xie, Jürgen, Mattusch, Rainer, Wennrich   +2 more
openaire   +2 more sources

Application of thermodynamic‐based retention time prediction to ionic liquid stationary phases

Journal of Separation Science, 2014
First‐ and second‐dimension retention times for a series of alkyl phosphates were predicted for multiple column combinations in GC×GC. This was accomplished through the use of a three‐parameter thermodynamic model where the analytes’ interactions with the stationary phases in both dimensions are known.
Brandon M, Weber, James J, Harynuk
openaire   +2 more sources

Retention divergence of terpenes with porous graphitized carbon and C18 stationary phases

Journal of Chromatography A, 2012
The significant divergence between the retention of 16 terpene standards on porous graphitized carbon (PGC) and C₁₈ packing materials are illustrated. The PGC surface is shown to provide a selectivity toward shape, polarity, and structure that is not afforded by the C₁₈ surface.
Paul G, Stevenson, Georges, Guiochon
openaire   +2 more sources

Characterization of Retention Mechanisms in Mixed-Mode HPLC with a Bimodal Reversed-Phase/Cation-Exchange Stationary Phase

Chromatographia, 2018
E. Lemasson, Y. Richer, S. Bertin, P. Hennig, C. West   +4 more
semanticscholar   +1 more source