Other Chiral GC CSPs

Konig et al. [66-68] separated acylated-a-hydroxy acid esters on S)-a-hydroxyalkanoic acid-(5)-a-phenylethylamide based CSPs. However, the 

In 1988, Macherey-Nagel, of Diiren, Germany, introduced the commercial GC CSPs under the trade name Lipodex [87]. Subsequently, in 1990, Armstrong and coworkers [88-91] coated polar CD derivatives on a fused silica column this technique has been commercialized by Advanced 

Separation Technologies Inc., of Whippany, NJ, USA. In 1991, the same company received two global patents for the use of two specific cyclodextrin derivatives for the separation of enantiomers by capillary GC. This technology is known by the trade name of Chiraldex. Various Chiraldex columns have been developed, using the prefixes A, B and G for the a-, and y-CDs, respectively [92], Similarly, Supelco have also developed various chiral stationary phases under the trade name of Dex a-Dex, S-Dex and y-Dex CSPs on fused silica capillary columns containing premethylated a-, and y-CDs coupled to a phenyl that contains a stationary polysiloxane 

Lipodex A [heptalds(2,3,6-tri-0-n-pentyl)-a-CD] Lipodex B [heptakis(3- 0-acetyl-2,6-di- 0-n-pentyl)-a-CD] Lipodex C [heptalds(2,3,6-tri-0-n-pentyl)-/S-CD] Lipodex D [heptakis(3-0-acetyl-2,6-di-0-n-pentyl)-/S-CD] Lipodex E [octakis(3-0-butyryl-2,6-di-0-n-pentyl)-y-CD] Macherey-Nagel, Dtiren, Germany 

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