Results 151 to 160 of about 5,957 (202)
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Journal of Chromatography B: Biomedical Sciences and Applications, 2000
Improved chiral selectivity was observed for numerous compounds when vancomycin was added to the mobile phase on a Chirobiotic-V column. This chiral mobile phase additive (CMPA) is the same chiral selector as that bonded to the stationary phase of this Chirobiotic-V column.
Q, Sun, S V, Olesik
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Improved chiral selectivity was observed for numerous compounds when vancomycin was added to the mobile phase on a Chirobiotic-V column. This chiral mobile phase additive (CMPA) is the same chiral selector as that bonded to the stationary phase of this Chirobiotic-V column.
Q, Sun, S V, Olesik
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Solute-Stationary Phase Interaction in Chiral Chromatography.
Advances in chromatography, 2016.
Asnin, Leonid D. +2 more
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Monolithic chiral stationary phases for liquid‐phase enantioseparation techniques
Journal of Separation Science, 2010AbstractThis short overview summarizes the development in the field of enantioselective monolithic chromatographic media and their application for pressure‐driven and electrokinetic separations. The major emphasis is put on the currently existing problems and the author's vision for their solution is provided.
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Temperature and enantioseparation by macrocyclic glycopeptide chiral stationary phases
Journal of Chromatography A, 2004Seventy-one chiral compounds were separated on four macrocyclic glycopeptide chiral selectors: teicoplanin, its aglycone, ristocetin A and vancomycin, using three possible separation modes: reversed phase with methanol/buffer mobile phases, normal phase with hexane/ethanol mobile phases and polar ionic mode (PIM) with 100% methanol mobile phase with ...
Alain, Berthod +2 more
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Derivatized vancomycin stationary phases for LC chiral separations
Talanta, 1996In this work, synthetic and natural chiral selectors were combined to form two different chiral stationary phases (CSPs). These were made by bonding R- or S-(1-naphthylethyl) carbamate (R-NEC or S-NEC)-derivatized vancomycin molecules to a silica gel support. The two CSPs were evaluated using a set of 60 enantiomeric pairs. The results were compared to
A, Berthod +3 more
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Facile Diastereoseparation of Glycosyl Sulfoxides by Chiral Stationary Phase
Chirality, 2016AbstractSeparation of the diastereomers of glycosyl sulfoxides differing in the sulfur chirality has been difficult. This article presents a fast and scalable method for their diastereoseparation using a chiral stationary phase. The usefulness of this method was demonstrated in a 500‐mg scale separation within 20 min, and in the separation of ...
Tohru, Taniguchi +5 more
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Chiral Ionic Liquids as Stationary Phases in Gas Chromatography
Analytical Chemistry, 2004Recently, it has been found that room-temperature ionic liquids can be used as stable, unusual selectivity stationary phases. They show "dual nature" properties, in that they separate nonpolar compounds as if they are nonpolar stationary phases and separate polar compounds as if they are polar stationary phases.
Jie, Ding +2 more
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Gas Chromatography of Organophosphorus Compounds on Chiral Stationary Phases
International Journal of Environmental Analytical Chemistry, 1987Abstract The gas chromatographic separation of the stereoisomers of several chiral organophosphorus compounds is described. Glass capillary columns coated with the non-chiral phases SE-30 and Carbowax 20M, or with the chiral phases Chirasil-Val and Ni(II)Bis[(1R)-3-(heptafluorobutyryl)camphorate] were used.
Degenhardt, C.E.A.M. +2 more
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Immobilized strychnine as a new chiral stationary phase for HPLC
ELECTROPHORESIS, 2017A new ion‐exchanger type chiral stationary phase for high‐performance liquid chromatography was prepared. The synthetic protocol is based on derivatization of silica with (3‐iodopropyl)trimethoxysilane in the first step followed by immobilization of strychnine via quaternization of nitrogen atom of the alkaloid strychnine.
David, Sýkora +6 more
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HPLC Enantioseparation on Cyclodextrin-Based Chiral Stationary Phases
2012Cyclodextrin-bonded silica material is one of the most commonly used chiral stationary phases in liquid chromatography for pharmaceutical analysis and enantioseparations. The approaches for immobilization of cyclodextrins onto the silica surface influence both, the stability of the chiral stationary phase and the enantioselectivity. In this chapter, we
Yong, Wang, Siu Choon, Ng
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