Astec CHIRALDEX A-DA SUPELCO Astec CHIRALDEX A-DA手性氣相色譜柱毛細管柱

參考價	￥ 11146
訂貨量	≥1

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公司名稱 杭州亞萊博儀器有限公司
品牌 Supelco/美國色譜科
型號 Astec CHIRALDEX A-DA
產地美國
廠商性質 代理商
更新時間 2017/2/7 12:18:06
訪問次數 1716

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Astec CHIRALDEX A-DA Supelco 手性氣相色譜柱手性毛細管柱手性

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杭州亞萊博儀器有限公司長期專注于國內外色譜配件、耗材和色譜柱的代理銷售，并努力塑造和推廣alab品牌，alab品牌經營的產品精挑細選。亞萊博公司擁有一個專業、年輕、有活力的團隊，從銷售到技術支持都一直堅持精益求精、誠實守信的公司核心企業文化，用心服務于廣大客戶。代理品牌主要有：大連依利特、上海伍豐、蘭化所、中科安泰、上海月旭、蘇州賽分、天津艾杰爾、迪馬、Agilent、Waters、Shimadzu、GL、YMC、Restek、Grace、Alltech、Kromasil、ThermoFisher、Shodex、TOSOH TSKgel、Supelco、Phenomenex、Perkin-Elmer、Hamilton、SGE、Merck、MN等。

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詳細信息 在線詢價

SUPELCO Astec CHIRALDEX A-DA手性氣相色譜柱毛細管柱

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管柱 訂貨信息：