Mobile phase effects on retention on a new butylimidazolium-based high-performance liquid chromatographic stationary phase

Sun, Yaqin; Stalcup, Apryll M.

doi:10.1016/j.chroma.2006.06.092

Cited by 38 publications

(14 citation statements)

References 32 publications

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“…The slope value of a plot of log retention factors for a series of solutes for the IL column versus analogous data for a phenyl column was about 0.8 as compared to corresponding slopes of 0.5 and 0.4 for a C8 and C18 column, respectively. Using the same IL stationary phase, a comparison of the LSER model with methanol -water and ACN -water mobile phases was made [50]. The methanol -water mobile phase accentuated the aromatic selectivity of the butylimidazolium bromide stationary phase while the ACNwater mobile phase showed retention selectivity differences of hydrogen bonding (acidic) solutes.…”

Section: Ils As Lc Stationary Phasesmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

179

103

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Ionic liquids (ILs), as separation media, have made significant contributions in the past decades in advancing research in gas chromatography (GC), liquid chromatography (LC), and capillary electrophoresis (CE). This review, covering reports published from the mid 1980s to early 2007, shows how ILs have been used so far in separation science, originally primarily as GC stationary phases and later as mobile phase additives (both millimolar and major percent levels) for LC and CE. Representative GC and LC chromatograms as well as CE electropherograms are shown. In addition, the very recent findings on the development of ionic liquids with surfactant properties and its applications for chiral and achiral analysis are discussed.

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Section: Ils As Lc Stationary Phasesmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

179

103

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“…SCIL phases have exhibited retention under both reversed-phase [38,50] and normal-phase [34] modes. As PAH are p-electron donors and p-acid= p-base interactions were among the earliest primary interactions exploited for chiral separations by liquid chromatography, [51] normal-phase mobile phase conditions were adopted from normal phase chiral separations.…”

Section: Chromatographic Characterizationmentioning

confidence: 98%

Normal Phase Chiral Separation of Hexahelicene Isomers Using a Chiral Surface Confined Ionic Liquid Stationary Phase

Kodali

Stalcup

2014

Journal of Liquid Chromatography & Related Technologies

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& In the last three decades, chiral high-performance liquid chromatography (HPLC) has proven to be one of the best methods for the direct separation and analysis of enantiomers because it can separate a wide variety of nonvolatile compounds. A mixture of chiral 2-(1H-imidazol-1-yl) cyclohexanol stereoisomers were prepared in-house and chirally resolved using R-(-)-mandelic acid. Chiral resolution of the selector was confirmed using circular dichroism spectropolarimetry and chiral capillary electrophoresis. A new chiral imidazolium-based surface-confined ionic liquid stationary phase was synthesized using this chiral selector and investigated for the separation of phenanthro[3,4-c] phenanthrene (hexahelicene), an atropisomeric polyaromatic hydrocarbon (PAH). Hexahelicene enantiomers were successfully separated under normal phase conditions using hexane=dichloromethane mobile phases.

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“…[18][19][20] According to literatures, 21,22 a butylimidazolium-based phase was shown to exhibit remarkable reversed-phase retention properties emanating from the imidazolium ring. Firstly, 6.0 g 1-chlorobutane and 4.2 g imidazole were added into a dry round bottom flask containing a magnetic stir bar, and then 50.0 mL toluene was added as solvent.…”

Section: Preparation Of Ils-based Monolithic Cartridgementioning

confidence: 99%

Extraction and Determination of Quercetin and Myricetin from Chamaecyparis obtusa by Ionic Liquids‐based Monolithic Cartridge

Zhu

Row

2011

Chin. J. Chem.

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A short ionic liquids (ILs)-based monolithic cartridge was prepared and used as the selective extraction sorbent. After the material was evaluated by field emission-scanning electron microscopy (FE-SEM), a new approach for the extraction and determination of quercetin and myricetin from Chamaecyparis obtusa (C. obtusa) by using ILs-based, monolithic cartridge system was developed. Chromatographic analysis was conducted on a C 18 column with UV detection at 372 nm, an eluting solution consisting of acetonitrile-water (25/75, V/V) as the mobile phase, and a flow rate of 0.7 mL•min -1 . A good linear relationship was demonstrated when the concentrations of quercetin and myricetin were in the range of 0.5-100.0 µg•mL -1 . The recoveries ranged from 101.6% to 104.6% and the interand intra-day relative standard deviations (RSD) were less than 5.0%. This method effectively removed the impurities and avoided tedious pretreatment. It provided a fast, economic and effective method for assaying trace drugs from natural plants.

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Mobile phase effects on retention on a new butylimidazolium-based high-performance liquid chromatographic stationary phase

Cited by 38 publications

References 32 publications

Utility of ionic liquids in analytical separations

Utility of ionic liquids in analytical separations

Normal Phase Chiral Separation of Hexahelicene Isomers Using a Chiral Surface Confined Ionic Liquid Stationary Phase

Extraction and Determination of Quercetin and Myricetin from Chamaecyparis obtusa by Ionic Liquids‐based Monolithic Cartridge

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