SUPELCO Astec CHIRALDEX A-DA手性气相色谱柱毛细管柱详细资料-杭州亚莱博仪器有限公司

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SUPELCO Astec CHIRALDEX A-DA手性气相色谱柱毛细管柱

简要描述：

SUPELCO Astec CHIRALDEX A-DA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

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详细介绍

SUPELCO Astec CHIRALDEX A-DA手性气相色谱柱毛细管柱

CD Type: α (alpha)
Derivative: Dialkyl
Temp. Limits: -10 °C to 200 °C (isothermal) or 220 °C (programmed)

Incorporates a phase consisting of a 2,6-di-O-pentyl-3-methoxy derivative of α-cyclodextrin. This phase is good for separations of heterocyclic amines. It has different selectivity from other phases and often shows reversal in elution from the PH phases.

The dipentylated derivatives of alpha, beta and gamma cyclodextrin show pronounced selectivity differences based on the size, shape and functionality of the analyte. Strong evidence exists for inclusion complexation which is the basic driving mechanism and, therefore, resolution is affected by sample load. The beta-cyclodextrin form has the broadest applicability. Sample volumes under 1 microliter at concentrations of 5 mg/mL are typical with the 100/1 split ratio.

Features:

Hydrophobic surface
Pronounced selectivity differences based on analyte size, shape and functionality
Separates heterocyclic amines
Different selectivity from other cyclodextrin derivatives
Often shows reversal in elution order from PH series

Selectivity priorities:

Alpha…Simple epoxides, cyclic ethers, linear substituted alkanes
Beta…Heterocyclic amines
Gamma…Naphthyl analogs

Mechanism Observations:

Stronger inclusion for DA and, therefore, size selectivity is important.
Critical temperature dependence for enantioselectivity. Above this temperature no separation occurs.

SUPELCO Astec CHIRALDEX A-DA手性气相色谱柱毛细管柱 订货信息：

Product #	Description
72003AST	Astec CHIRALDEX A-DA 毛细管气相色谱柱 L × I.D. 30 m × 0.25 mm, d_f 0.12 μm

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