HYDRODEX cyclodextrin phases
Capillary columns for GC enantiomer separation
Features
- Base material: cyclic oligosaccharides consisting of seven (β-cyclodextrin) or eight (γ-cyclodextrin) glucose units bonded through α-1,4-linkages
- Regioselective derivatization of the hydroxyl groups leads to phases with varying enantioselectivity, which are well suited for GC enantiomer analyses.
- Due to the high melting point of the HYDRODEX phases they are diluted with polysiloxanes.
- Important advantage of cyclodextrin phases: many compounds can be analyzed without derivatization (however, for certain substances enantioselectivity can be favorably influenced by formation of derivatives)
A large number of separations have been achieved, however, it is not possible to make a general prediction, which phase could solve a given separation task. Even for compounds with small structural differences or within homologous series the enantiodifferentiation can be quite different. The descriptions below list some of the typical separations possible with individual phases.
HYDRODEX β-PM · heptakis-(2,3,6-tri-O-methyl)-β-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for hydroxycarboxylic acid esters, alcohols, diols, olefins, lactones, acetals
- Max. temperature for isothermal operation 230 °C
- max. temperature for short isotherms in a temperature program 250 °C
HYDRODEX β-3P · heptakis-(2,6-di-O-methyl-3-O-pentyl)-β-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for terpenes, dienes, allenes, terpene alcohols, 1,2-epoxyalkanes, carboxylic acids (esters), hydroxycarboxylic acid esters, pharmaceutics, pesticides
- Max. temperature for isothermal operation 230 °C
- max. temperature for short isotherms in a temperature program 250 °C
HYDRODEX β-6TBDM · heptakis-(2,3-di-O-methyl-6-O-t-butyldimethylsilyl)-β-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for γ-lactones, cyclopentanones, terpenes, esters, tartrates
- Max. temperature for isothermal operation 230 °C
- max. temperature for short isotherms in a temperature program 250 °C
HYDRODEX β-6TBDE · heptakis-(2,3-di-O-ethyl-6-O-t-butyldimethylsilyl)-β-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for essential oils
- Max. temperature for isothermal operation 230 °C
- max. temperature for short isotherms in a temperature program 250 °C
HYDRODEX β-TBDAc · heptakis-(2,3-di-O-acetyl-6-O-t-butyldimethylsilyl)-β-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for alcohols, esters, ketones, aldehydes, δ-lactones
- Max. temperature for isothermal operation 220 °C
- max. temperature for short isotherms in a temperature program 240 °C
HYDRODEX γ-TBDAc · octakis-(2,3-di-O-acetyl-6-O-t-butyldimethylsilyl)-γ-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for cyclic ketones, aromatic ketones, oxiranes, aromatic esters, aromatic amides
- Max. temperature for isothermal operation 220 °C
- max. temperature for short isotherms in a temperature program 240 °C
HYDRODEX γ-DiMOM · octakis-(2,3-di-O-methoxymethyl-6-O-t-butyldimethylsilyl)-γ-cyclodextrin
- Phase diluted with optimized polysiloxane
- Recommended for ketones, terpenes, cyclic ethers, alcohols, amines
- Max. temperature for isothermal operation 220 °C
- max. temperature for short isotherms in a temperature program 240 °C