Ionic liquid-copolymerized monolith incorporated with zeolitic imidazolate framework-8 as stationary phases for enhancing reversed phase selectivity in capillary electrochromatography

2018 ◽  
Vol 1578 ◽  
pp. 99-105 ◽  
Author(s):  
Zhenkun Mao ◽  
Tao Bao ◽  
Zhentao Li ◽  
Zilin Chen
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrochromatography ◽  
Stationary Phases ◽  
Reversed Phase ◽  
Zeolitic Imidazolate Framework ◽  
Phase Selectivity

An innovative reversed-phase monolithic column modified with 4-vinylbiphenyl and ionic liquid stationary phases for capillary electrochromatography

2019 ◽  
Vol 43 (30) ◽  
pp. 12013-12019 ◽  
Author(s):  
Xiangju Mao ◽  
Lu Liu ◽  
Fang Xiao ◽  
Wenshan Ni ◽  
Xintao Cheng
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrochromatography ◽  
Monolithic Column ◽  
Stationary Phases ◽  
Reversed Phase ◽  
Electrochromatographic Separation

A poly(VBP-co-EDMA-co-IL) monolithic column was used for electrochromatographic separation.

Application of Mobile Phases Containing Ionic Liquid for HPLC Analysis of Selected Isoquinoline Alkaloids

2017 ◽  
Vol 100 (6) ◽  
pp. 1652-1659 ◽  
Author(s):  
Anna Petruczynik ◽  
Justyna Misiurek ◽  
Tomasz Tuzimski ◽  
Monika Waksmundzka-Hajnos
Keyword(s):  
Ionic Liquid ◽  
Stationary Phases ◽  
Reversed Phase ◽  
System Efficiency ◽  
Organic Modifier ◽  
Optimal Conditions ◽  
Retention Behavior ◽  
Isoquinoline Alkaloids ◽  
Mobile Phases ◽  
Chemical Groups

Abstract An HPLC procedure on a polar reversed-phase column with mobile phases containing ionic liquid (IL) was developed for the analysis of selected alkaloids from different chemical groups. We aimed to obtain optimal conditions for the separation of alkaloids because widely used silica-based stationary phases exhibit a silanol effect, rendering analysis of basic analytes extremely difficult. Retention, separation selectivity, peak symmetry, and system efficiency were examined in various eluent systems containing different concentrations of IL and acetonitrile. The obtained results revealed substantial influence from the concentrations of IL, the organic modifier, and temperature on the retention behavior of the investigated alkaloids. The most selective and efficient chromatographic systems were applied for the analysis of several alkaloids in a plant extract.

A reversed-phase/hydrophilic bifunctional interaction mixed-mode monolithic column with biphenyl and quaternary ammonium stationary phases for capillary electrochromatography

The Analyst ◽  
2019 ◽  
Vol 144 (14) ◽  
pp. 4386-4394 ◽  
Author(s):  
Zhenkun Mao ◽  
Changjun Hu ◽  
Zhentao Li ◽  
Zilin Chen
Keyword(s):  
Quaternary Ammonium ◽  
Capillary Electrochromatography ◽  
Mixed Mode ◽  
Monolithic Column ◽  
Stationary Phases ◽  
Reversed Phase

A novel RPLC/HILIC mixed-mode monolithic column with biphenyl and quaternary ammonium stationary phases is synthesized for capillary electrochromatography.

Hydride-based HPLC stationary phases: a rapidly evolving technology for the development of new bio-analytical methods

2014 ◽  
Vol 6 (13) ◽  
pp. 4496-4503 ◽  
Author(s):  
Joseph J. Pesek ◽  
Reinhard I. Boysen ◽  
Milton T. W. Hearn ◽  
Maria T. Matyska
Keyword(s):  
Analytical Methods ◽  
Stationary Phases ◽  
Reversed Phase ◽  
Normal Phase ◽  
Silica Hydride ◽  
Phase Selectivity ◽  
Aqueous Normal Phase

This review focuses on the application of various silica hydride stationary phases under conditions that enable the advantages of reversed-phase, aqueous normal phase and organic normal phase selectivity to be gained.

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