SUPELCO Astec CHIRALDEX G-DA手性氣相色譜柱 毛細管柱
Supelco（色譜科）位于美國賓夕法尼亞州，是Sigma-Aldrich集團下屬的子品牌，Supelco一直通過提供更新的，更可靠的色譜產(chǎn)品和來幫助色譜工作者來解決問題，其涉及的領域和行業(yè)有環(huán)境、食品、飲料、政府、醫(yī)藥、化工等

SUPELCO Astec CHIRALDEX G-DA手性氣相色譜柱 毛細管柱
 

• CD Type: γ (gamma)
• 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 γ-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 surfacePronounced 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 G-DA手性氣相色譜柱 毛細管柱 訂貨信息：

Product #	Description
72033AST	Astec CHIRALDEX G-DA 毛細管氣相色譜柱 L × I.D. 30m × 0.25 mm, df 0.12 μm