Astec CHIRALDEX A-TA SUPELCO 手性气相色谱柱 毛细管柱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 A-TA SUPELCO 手性气相色谱柱 毛细管柱
Incorporates a phase consisting of a 2,6-di-O-pentyl-3-trifluoroacetyl derivative of α-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:
Analytes:
Useful for homologous series of:
Mechanism Observations:
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.
Astec CHIRALDEX A-TA SUPELCO 手性气相色谱柱 毛细管柱
订货信息:
Product # | Description |
73002AST | Astec? CHIRALDEX? A-TA 毛细管气相色谱柱 L × I.D. 20 m × 0.25 mm, df 0.12 μm |
73003AST | Astec? CHIRALDEX? A-TA 毛细管气相色谱柱 L × I.D. 30 m × 0.25 mm, df 0.12 μm |
73004AST | Astec? CHIRALDEX? A-TA 毛细管气相色谱柱 L × I.D. 40 m × 0.25 mm, df 0.12 μm |
73005AST | Astec? CHIRALDEX? A-TA 毛细管气相色谱柱 L × I.D. 50 m × 0.25 mm, df 0.12 μm |
Astec CHIRALDEX A-TA
订购:
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