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

Astec CHIRALDEX G-TA SUPELCO 手性气相色谱柱 Supelco（色谱科）位于美国宾夕法尼亚州，是Sigma-Aldrich集团下属的子品牌，Supelco一直通过提供更新的，更可靠的色谱产品和技术支持来帮助色谱工作者来解决问题，其涉及的领域和行业有环境、食品、饮料、政府、医药、化工等

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

• 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 手性气相色谱柱 毛细管柱

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

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