Astec CHIRALDEX A-DA SUPELCO 手性氣相色譜柱 毛細(xì)管柱- 詳細(xì)介紹：
Astec CHIRALDEX A-DA SUPELCO 手性氣相色譜柱 毛細(xì)管柱
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CD Type: α (alpha)
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Derivative: Dialkyl
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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:
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Hydrophobic surface
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Pronounced selectivity differences based on analyte size, shape ａnd functionality
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Separates heterocyclic amines
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Different selectivity from other cyclodextrin derivatives
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Often shows reversal in elution order from PH series
Selectivity priorities:
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Alpha…Simple epoxides, cyclic ethers, linear substituted alkanes
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Beta…Heterocyclic amines
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Gamma…Naphthyl analogs
Mechanism Observations:
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Stronger inclusion for DA and, therefore, size selectivity is important.
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Critical temperature dependence for enantioselectivity. Above this temperature no separation occurs.
Astec CHIRALDEX A-DA SUPELCO 手性氣相色譜柱 毛細(xì)管柱
訂貨信息：
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Product # |
Description |
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72003AST |
Astec® CHIRALDEX® A-DA 毛細(xì)管氣相色譜柱 L × I.D. 30 m × 0.25 mm, df 0.12 μm |
Astec CHIRALDEX A-DA SUPELCO 手性氣相色譜柱 毛細(xì)管柱
訂購熱線電話：
上海屹利科學(xué)儀器有限公司 www.elab17.cn 021-60545257 18602129317
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