SUPELCO Astec CHIRALDEX G-TA手性气相色谱柱 毛细管柱

CD Type: γ (gamma)Derivative: TrifluoroacetylTemp. Limits: -10 °C to 180 °C (isothermal or programmed)

Incorporates a phase consisting of a 2,6-di-O-pentyl-3-trifluoroacetyl derivative of γ-cyclodextrin.

Trifluoroacetylation of the 3 position hydroxyl groups after pentylation of the 2,6 hydroxyl groups creates a phase with high selectivity for oxygen containing analytes in the form of alcohols, ketones, acids, aldehydes, lactones, and halogenated compounds.

Features:

Separates the widest variety of enantiomersSeparates the greatest number of enantiomersGamma more selective than beta formUnique retention behaviorExtraordinary versatility and chiral selectivity

Analytes:

Useful for homologous series of:

Amino acids (primary, secondary, aromatic and aliphatic)Amines (primary, secondary, cyclic, aromatic and halogenated)Amino alcoholsAlkanes, hydrogenated alkanesAlcohols (aliphatic and aromatic)Acids (halogenated and hydroxy)Esters (aromatic, aliphatic, hydroxy, di-ester)DiolsLactonesKetonesPhthalidesSulfoxides

Mechanism Observations:

Strong dipole-dipole interactionsLonger alkyl chain; greater retention; increase in enantioselectivity up to C4/C5Halogens known to favor cavity interaction

Dipole-dipole interactions are commonly identified in the mechanism of separation for TA phases. In a homologous series of alkane enantiomers, identical alpha values are observed regardless of chain length or branching indicating only 1 or 2 carbons may be contributing to chiral recognition. Alpha values are greatly affected by size and polarity of the head group. Functional groups like epoxides, amino alcohols and alcohols can dictate the cyclodextrin selection. Aldehydes, carboxylic acids and epoxides separate better on the gamma while alcohols, alcohol amines and other linear molecules separate better on the beta derivative.

Included in GC Screening Kit 71030AST.

SUPELCO Astec CHIRALDEX G-TA手性气相色谱柱 毛细管柱 订货信息：

Product#	Description
73031AST	Astec CHIRALDEXG-TA 毛细管气相色谱柱 L × I.D. 10m × 0.25mm, df 0.12μm
73032AST	Astec CHIRALDEXG-TA 毛细管气相色谱柱 L × I.D. 20m × 0.25mm, df 0.12μm
73033AST	Astec CHIRALDEXG-TA 毛细管气相色谱柱 L × I.D. 30m × 0.25mm, df 0.12μm
73034AST	Astec CHIRALDEXG-TA 毛细管气相色谱柱 L × I.D. 40m × 0.25mm, df 0.12μm
73035AST	Astec CHIRALDEXG-TA 毛细管气相色谱柱 L × I.D. 50m × 0.25mm, df 0.12μm