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

• CD Type: γ (gamma)
• Derivative: Dipropionyl
• Temp. Limits: -10 °C to 200 °C (isothermal) or 220 °C (programmed) 

    Incorporates a phase consisting of a 2,3-di-O-propionyl-6-t-butyl silyl derivative of γ-cyclodextrin. This phase exhibits good hydrolytic stability, broad chiral selectivity, ａnd are excellent for aliphatic ａnd aromatic amines. It is also good for many aliphatic ａnd some aromatic esters as well as exhibiting high efficiency ａnd resolution at low retention times for polar racemates.

Features: 

• Broad chiral selectivity
• Good hydrolytic stability
• Thermal limit 200/220 °C
• Excellent for aromatic ａnd aliphatic amines
• Good for many aliphatic ａnd some aromatic esters
• High efficiency ａnd resolution at low retention times for polar racemates

Mechanism Observations:

• Mostly surface interactions
• Fused ring structures better selectivity on gamma
• Acids have better selectivity as methyl rather than ethyl esters

Size Selectivity:

    Both speed ａnd sample capacity indicate a surface type mechanism for very polar racemates. Large bulky molecules still require a larger surface area than beta provides, therefore, an increase in selectivity is seen on the gamma derivative for fused ring structures. The smaller alpha cavity offered no selectivity while the beta covered the largest range of molecular sizes but the choice between beta ａnd gamma is compound dependent for this phase.

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

訂貨信息：

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

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