نتایج جستجو برای: chiral stationary phases

تعداد نتایج: 200310  

Journal: :Molecules 2016
Tohru Shibata Satoshi Shinkura Atsushi Ohnishi Kazuyoshi Ueda

Chromatographic separation of several sets of aromatic position isomers on three cellulose- and one amylose-based chiral stationary phases was performed to evaluate the potential of a polysaccharide-based chiral stationary phase (CSP) in the separation of isomeric or closely similar molecules, and to understand the interaction mechanism of this type of CSP with analytes. Their ability of molecu...

2004
R. Reinhardt A. Steinborn

Cyclodextrin phases are one of the most interesting geometry selective stationary phase in GC. 'beyare outstanding in their ability to separate isomeric and enantiomeric compounds. Two examples of the separation of cyclic compounds on cyclodextrins are given. The combination of chiral and achiral phases in series coupled columns is a useful tool for complicate separation and identification prob...

2009
Yuri Sugiura Chiyo Yamamoto Tomoyuki Ikai Masami Kamigaito Yoshio Okamoto

Novel amylose ester derivatives were synthesized and their chiral recognition abilities as chiral stationary phases for highperformance liquid chromatography were evaluated. Compared with amylose benzoate derivatives, cinnamate derivatives showed a higher chiral recognition ability and some racemates could be efficiently resolved. The recognition abilities of these derivatives varied significan...

2005
William H. Porter

Many drugs are administered as racemates, yet the enantiomers may have important pharmacodynamic and/or pharmacokinetic differences. Chiral analytical techniques are necessary to properly assess and understand such differences. Novel techniques to separate drug enantiomers present in serum and/or urine have recently emerged. This review describes commonly used approaches to chiral drug analysis...

Journal: :Journal of chromatographic science 2005
Byoung-Hyoun Kim Sang Uk Lee

The direct enantioseparation of a novel aminothiazolecarboxamide fungicide, ethaboxam, on polysaccharide-derived chiral stationary phases (CSPs) is described. Good resolution is achieved with several polysaccharide-derived CSPs. Chiralcel OD (OD-H) and Chiralpak AS are excellent for direct enantiomer separation of ethaboxam. The elution behavior and the effects of eluent composition on the reso...

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