SUPELCO Astec CHIRALDEX G-DP手性氣相色譜柱 毛細(xì)管柱
Supelco（色譜科）位于美國(guó)賓夕法尼亞州，是Sigma-Aldrich集團(tuán)下屬的子品牌，Supelco一直通過(guò)提供更新的，更可靠的色譜產(chǎn)品和來(lái)幫助色譜工作者來(lái)解決問(wèn)題，其涉及的領(lǐng)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-DP手性氣相色譜柱 毛細(xì)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.

 

SUPELCO Astec CHIRALDEX G-DP手性氣相色譜柱 毛細(xì)管柱 訂貨信息：

Product #	Description
78033AST	Astec CHIRALDEX G-DP 毛細(xì)管氣相色譜柱 L × I.D. 30m × 0.25 mm, df 0.12 μm