Astec CHIRALDEX G-TA SUPELCO 手性液相液相色谱柱 孔状管柱
 

• CD Type: γ (gamma)
• Derivative: Trifluoroacetyl
• Temp. 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 enantiomers
• Separates the greatest number of enantiomers
• Gamma more selective than beta form
• Unique retention behavior
• Extraordinary 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 alcohols
• Alkanes, hydrogenated alkanes
• Alcohols (aliphatic and aromatic)
• Acids (halogenated and hydroxy)
• Esters (aromatic, aliphatic, hydroxy, di-ester)
• Diols
• Lactones
• Ketones
• Phthalides
• Sulfoxides

 

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. 

Astec CHIRALDEX G-TA SUPELCO 手性气质联用气相色谱柱 孔隙管柱

订购问题：

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

 

Astec CHIRALDEX G-TA

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