Enantiomer separations using chloroacyl pentyl cyclodextrins as chiral GC stationary phases

✍ Scribed by Aroonsiri Shitangkoon; Gyula Vigh

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 276 KB
• Volume: 7
• Category: Article
• ISSN: 1040-7685
• DOI: 10.1002/mcs.1220070509

✦ Synopsis

Abstract

Chloroacyl pentyl β‐cyclodextrin derivatives were synthesized for use as gas chromatographic stationary phases. Capillary columns of identical phase ratios were prepared with the liquid undiluted monochloro‐, dichloro‐, and trichloroactyl phases and the respective column efficiency, capacity factor, and separation selectivity values were determined. For most of the enantiomeric pairs studied, monochloroacetyl pentyl β‐cyclodextrin (M) offers the highest selectivity values, though at the expense of large capacity factors (long analysis times) and low column efficiencies. Dichloroacetyl pentyl β–cyclodextrin (D) provides a good compromise between sufficiently high chiral selectivities and acceptable column efficiencies. Trichloroacetyl pentyl β‐cyclodextrin (T) permits the preparation of very efficient columns, but offers lower chiral selectivities than the other two chloroacyl derivatives. © 1995 John Wiley & Sons, Inc.