Effect of content of chiral selector and pore size of core-shell type silica support on the performance of amylose tris(3,5-dimethylphenylcarbamate)-based chiral stationary phases in nano-liquid chromatography and capillary electrochromatography. 2014

Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
Institute of Chemical Methodologies, Consiglio Nazionale delle Ricerche, Area della Ricerca di Roma I, Via Salaria Km 29,300, 00015 Monterotondo, Roma, Italy.

In this study the separation performance of various chiral stationary phases (CSPs) made of polysaccharide-based chiral selectors coated onto superficially porous (core-shell or fused-core) silica supports were evaluated. The CSPs obtained by coating of various amounts of chiral selector (1-5%) onto supports of various pore size (100 and 300 Å) were studied. Their evaluation was pursued in both chiral nano-liquid chromatography (nano-LC) and chiral capillary electrochromatography (CEC). Among the goals of this study was to re-examine our previous unexpected finding of better performance of superficially porous CSP under CEC conditions compared to nano-LC conditions for a new set of chiral compounds, as well as to study the effect of varying the chiral selector content and nominal pore size of supporting silica on the performance of core-shell silica-based polysaccharide-type CSPs. Based on the results of this study it can be seen that CSPs based on superficially porous silica can successfully be used for the separation of enantiomers in both nano-LC and CEC mode. Only a slight advantage of CEC over nano-LC mode was observed in this study from the viewpoint of plate numbers, especially at higher mobile phase flow rates. It must also be noted that the optimal theoretical plate height is still too high and further optimization of superficially porous CSPs is necessary for both nano-LC and CEC applications.

UI MeSH Term Description Entries
D002853 Chromatography, Liquid Chromatographic techniques in which the mobile phase is a liquid. Liquid Chromatography
D000688 Amylose An unbranched glucan in starch.
D012822 Silicon Dioxide Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. Silica,Aerosil,Aerosil 380,Cristobalite,Quso G-32,Quso G32,Tridymite,380, Aerosil,Dioxide, Silicon,G32, Quso,Quso G 32
D053801 Capillary Electrochromatography A separation technique which combines LIQUID CHROMATOGRAPHY and CAPILLARY ELECTROPHORESIS. Chip Electrochromatography,Electrochromatography, Capillary,Capillary Electrochromatographies,Electrochromatography, Chip
D020374 Chromatography, Micellar Electrokinetic Capillary A hybrid separation technique combining both chromatographic and electrophoretic separation principles. While the method was invented to separate neutral species, it can also be applied to charged molecules such as small peptides. MECC,MEKC,Micellar Electrokinetic Capillary Chromatography

Related Publications

Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
June 2012, Electrophoresis,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
January 2006, Journal of chromatography. A,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
January 2008, Journal of chromatography. A,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
October 2010, Journal of separation science,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
March 2006, Journal of chromatography. A,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
September 2008, Se pu = Chinese journal of chromatography,
Silvia Rocchi, and Salvatore Fanali, and Tivadar Farkas, and Bezhan Chankvetadze
May 2008, Journal of chromatography. A,
Copied contents to your clipboard!