Polyacrylate liquid crystalline stationary phases in supercritical fluid chromatography with carbon dioxide mobile phase

Rokushika, Souji; Naikwadi, K.P.; Jadhav, A. L.; Hatano, Hiroyuki

doi:10.1007/bf02257330

Cited by 12 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liquid crystal materials including LCPs can be characterized by inverse gas chromatography 64 Commonly, polymers with a poly(siloxane) backbone and pendant side chain liquid crystalline groups are used. 67,68 The preparation of LCPs suitable for the separation of polychlorinated dibenzodioxins, dibenzofurans, and other polychlorinated aromatics have been described. 65 This type of polymers is addressed as mesomorphic poly(siloxane).…”

Section: Stationary Phasesmentioning

confidence: 99%

Liquid Crystal Polymers

Fink

2008

High Performance Polymers

View full text Add to dashboard Cite

Section: Stationary Phasesmentioning

confidence: 99%

Liquid Crystal Polymers

Fink

2008

High Performance Polymers

View full text Add to dashboard Cite

“…Liquid crystalline (LC) stationary phases (SPs) are widely used as a separation material in GC and have been around for over 40 years [1]. In addition, LC-SP has shown applications in supercritical fluid chromatography [2,3] and HPLC [4][5][6][7][8][9][10]. However, in comparison to GC, the use of LC-SPs in HPLC and supercritical fluid chromatography is less prevalent.…”

Section: Introductionmentioning

confidence: 99%

Packed‐column capillary electrochromatography and capillary electrochromatography‐mass spectrometry using a lithocholic acid stationary phase

Norton

Shamsi

2008

Electrophoresis

View full text Add to dashboard Cite

The preparation and characterization of a novel lithocholic acid (LCA)-based liquid crystalline (LC) stationary phase (SP) suitable for application in packed-column CEC and CEC coupled to MS is described. The extent of bonding reactions of LCA-SP was assessed using 1 H-NMR, 13 C-NMR and elemental analysis. This characterization is followed by application of the LCA-SP for separation of β-blockers, phenylethylamines (PEAs), polyaromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). Using the optimum mobile phase operating conditions (pH 3.0-4.5, 10 mM ammonium acetate, 85% v/v ACN), a comparison of the chromatographic ability of the aminopropyl silica phase vs. the LCA-bonded phase was conducted. The results showed improved selectivity for all test analytes using the latter phase. For example, the CEC-MS of β-blockers demonstrated that the LCA-bonded phase provides separation of six out of seven β-blockers, whereas the amino silica phase provides four peaks of several co-eluting β-blockers. For the CEC-MS analysis of PEAs, the LCA-bonded phase showed improved resolution and different selectivity as compared to the aminopropyl phase. An evaluation of the retention trends for PEAs on both phases suggested that the PEAs were retained based on varying degree of hydroxyl substitution on the aromatic ring. In addition, the MS characterization shows several PEAs fragment in the electrospray either by loss of an alkyl group and/or by loss of H 2 O. Finally, the LCA-bonded phase displayed significantly higher separation selectivity for PAHs and PCBs as compared to the amino silica phase.

show abstract

Chromatographie mit überkritischen dichten mobilen Phasen (SFC)

Klesper

Küppers

1993

Analytiker-Taschenbuch

View full text Add to dashboard Cite

Polyacrylate liquid crystalline stationary phases in supercritical fluid chromatography with carbon dioxide mobile phase

Cited by 12 publications

References 26 publications

Liquid Crystal Polymers

Liquid Crystal Polymers

Packed‐column capillary electrochromatography and capillary electrochromatography‐mass spectrometry using a lithocholic acid stationary phase

Chromatographie mit überkritischen dichten mobilen Phasen (SFC)

Contact Info

Product

Resources

About