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

CD Type: γ (gamma)Derivative: DipropionylTemp. 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 selectivityGood hydrolytic stabilityThermal limit 200/220 °CExcellent for aromatic and aliphatic aminesGood for many aliphatic and some aromatic estersHigh efficiency and resolution at low retention times for polar racemates

Mechanism Observations:

Mostly surface interactionsFused ring structures better selectivity on gammaAcids 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.

SUPELCO Astec CHIRALDEX G-DP手性气相色谱柱 毛细管柱 订货信息：

Product#	Description
78033AST	Astec CHIRALDEXG-DP 毛细管气相色谱柱 L × I.D. 30m × 0.25mm, df 0.12μm