日韩中文字幕精品免费一区,欧美91精品久久久久网免费,国产精品视频久

產(chǎn)品列表PRODUCTS LIST

首頁(yè)>產(chǎn)品中心>氣相色譜柱>SUPELCO氣相色譜柱>Astec CHIRALDEX G-DASUPELCO Astec CHIRALDEX G-DA手性氣相色譜柱毛細(xì)管柱

SUPELCO Astec CHIRALDEX G-DA手性氣相色譜柱毛細(xì)管柱

簡(jiǎn)要描述：

SUPELCO Astec CHIRALDEX G-DA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一直通過提供更新的，更可靠的色譜產(chǎn)品和來幫助色譜工作者來解決問題，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

發(fā)郵件給我們：alab17@163.com

分享到： 1

詳細(xì)介紹

SUPELCO Astec CHIRALDEX G-DA手性氣相色譜柱毛細(xì)管柱

CD Type: γ (gamma)
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 γ-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 surfacePronounced 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 G-DA手性氣相色譜柱毛細(xì)管柱 訂貨信息：

Product #	Description
72033AST	Astec CHIRALDEX G-DA 毛細(xì)管氣相色譜柱 L × I.D. 30m × 0.25 mm, d_f 0.12 μm

上一篇：Astec CHIRALDEX G-DMSUPELCO Astec CHIRALDEX G-DM手性氣相色譜柱毛細(xì)管柱

下一篇：Astec CHIRALDEX G-BPSUPELCO Astec CHIRALDEX G-BP手性氣相色譜柱毛細(xì)管柱

返回列表>>

相關(guān)產(chǎn)品

SPB-1SUPELCO SPB-1毛細(xì)管柱氣相色譜柱 SPB-5SUPELCO SPB-5毛細(xì)管柱氣相色譜柱 5%苯基95%甲基聚硅氧烷 Supelcowax-10SUPELCO Supelcowax-10毛細(xì)管柱氣相色譜柱 PEG-20M鍵合，聚乙二醇 SPB-50SUPELCO SPB-50毛細(xì)管柱氣相色譜柱 50%二苯基,50%二甲基聚硅氧烷 Astec CHIRALDEX B-DMSUPELCO Astec CHIRALDEX B-DM手性氣相色譜柱毛細(xì)管柱 Astec CHIRALDEX A-DASUPELCO Astec CHIRALDEX A-DA手性氣相色譜柱毛細(xì)管柱 Astec CHIRALDEX A-TASUPELCO Astec CHIRALDEX A-TA手性氣相色譜柱毛細(xì)管柱 Astec CHIRALDEX B-PHSUPELCO Astec CHIRALDEX B-PH手性氣相色譜柱毛細(xì)管柱 Astec CHIRALDEX B-DPSUPELCO Astec CHIRALDEX B-DP手性氣相色譜柱毛細(xì)管柱 Astec CHIRALDEX B-PMSUPELCO Astec CHIRALDEX B-PM手性氣相色譜柱毛細(xì)管柱