Astec CHIRALDEX A-DA SUPELCO Astec CHIRALDEX A-DA手性氣相色譜柱 毛細(xì)管柱
| 參考價(jià) | ￥ 11146 |
| 訂貨量 | ≥1 |
- 公司名稱 杭州亞萊博儀器有限公司
- 品牌 Supelco/美國(guó)色譜科
- 型號(hào) Astec CHIRALDEX A-DA
- 產(chǎn)地 美國(guó)
- 廠商性質(zhì) 代理商
- 更新時(shí)間 2017/2/7 12:18:06
- 訪問(wèn)次數(shù) 1313
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液相色譜儀 氣相色譜儀 液相色譜柱 毛細(xì)管柱 色譜配件 電子天平 分光光度計(jì) 酸度計(jì) 電導(dǎo)率儀 溶氧儀等等
SUPELCO Astec CHIRALDEX A-DA手性氣相色譜柱 毛細(xì)管柱
- CD Type: α (alpha)
- 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 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:
- Hydrophobic surface
- Pronounced 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 A-DA手性氣相色譜柱 毛細(xì)管柱 訂貨信息：
| Product # | Description |
| 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 |
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