国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

上海屹利科學(xué)儀器有限公司
中級(jí)會(huì)員 | 第12年

18602129317

當(dāng)前位置:上海屹利科學(xué)儀器有限公司>>氣相色譜柱>>SUPELCO氣相色譜柱>> Astec CHIRALDEX B-TASUPELCO 手性氣相色譜柱 毛細(xì)管柱

SUPELCO 手性氣相色譜柱 毛細(xì)管柱

參  考  價(jià)面議
具體成交價(jià)以合同協(xié)議為準(zhǔn)

產(chǎn)品型號(hào)Astec CHIRALDEX B-TA

品       牌Supelco/美國色譜科

廠商性質(zhì)代理商

所  在  地上海市

更新時(shí)間:2015-11-12 20:42:44瀏覽次數(shù):1714次

聯(lián)系我時(shí),請(qǐng)告知來自 化工儀器網(wǎng)
同類優(yōu)質(zhì)產(chǎn)品更多>
Astec CHIRALDEX B-TA SUPELCO 手性氣相色譜柱 毛細(xì)管柱
Supelco(色譜科)位于美國賓夕法尼亞州,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

Astec CHIRALDEX B-TA SUPELCO 手性氣相色譜柱 毛細(xì)管柱
 

  • D Type: β (beta)
  • Derivative: Trifluoroacetyl
  • Temp. Limits: -10 °C to 180 °C (isothermal or programmed)

    Incorporates a phase consisting of a 2,6-di-O-pentyl-3-trifluoroacetyl derivative of β-cyclodextrin.

    Trifluoroacetylation of the 3 position hydroxyl groups after pentylation of the 2,6 hydroxyl groups creates a phase with high selectivity for oxygen containing analytes in the form of alcohols, ketones, acids, aldehydes, lactones, and halogenated compounds.

Features: 

  • Separates the widest variety of enantiomers
  • Separates the greatest number of enantiomers
  • Gamma more selective than beta form
  • Unique retention behavior
  • Extraordinary versatility and chiral selectivity

Analytes:

  Useful for homologous series of:

  • Amino acids (primary, secondary, aromatic and aliphatic)
  • Amines (primary, secondary, cyclic, aromatic and halogenated)
  • Amino alcoholsAlkanes, hydrogenated alkanes
  • Alcohols (aliphatic and aromatic)
  • Acids (halogenated and hydroxy)
  • Esters (aromatic, aliphatic, hydroxy, di-ester)
  • DiolsLactones
  • Ketones
  • Phthalides
  • Sulfoxides

Mechanism Observations:

  • Strong dipole-dipole interactions
  • Longer alkyl chain; greater retention; increase in enantioselectivity up to C4/C5
  • Halogens known to favor cavity interaction

    Dipole-dipole interactions are commonly identified in the mechanism of separation for TA phases. In a homologous series of alkane enantiomers, identical alpha values are observed regardless of chain length or branching indicating only 1 or 2 carbons may be contributing to chiral recognition. Alpha values are greatly affected by size and polarity of the head group. Functional groups like epoxides, amino alcohols and alcohols can dictate the cyclodextrin selection. Aldehydes, carboxylic acids and epoxides separate better on the gamma while alcohols, alcohol amines and other linear molecules separate better on the beta derivative.

 

Astec CHIRALDEX B-TA SUPELCO 手性氣相色譜柱 毛細(xì)管柱

訂貨信息:

Product #Description
73022AST Astec? CHIRALDEX? B-TA 毛細(xì)管氣相色譜柱 L × I.D. 20m × 0.25 mm, df 0.12 μm
73023ASTAstec? CHIRALDEX? B-TA 毛細(xì)管氣相色譜柱 L × I.D. 30m × 0.25 mm, df 0.12 μm
73024AST Astec? CHIRALDEX? B-TA 毛細(xì)管氣相色譜柱 L × I.D. 40 m × 0.25 mm, df 0.12 μm

 

Astec CHIRALDEX B-TA

訂購:

上海屹利科學(xué)儀器有限公司  www.elab17。。cn   

上海屹利科學(xué)儀器有限公司(杭州辦)   

會(huì)員登錄

×

請(qǐng)輸入賬號(hào)

請(qǐng)輸入密碼

=

請(qǐng)輸驗(yàn)證碼

收藏該商鋪

X
該信息已收藏!
標(biāo)簽:
保存成功

(空格分隔,最多3個(gè),單個(gè)標(biāo)簽最多10個(gè)字符)

常用:

提示

X
您的留言已提交成功!我們將在第一時(shí)間回復(fù)您~
撥打電話
在線留言
平山县| 汝南县| 玛纳斯县| 麻城市| 前郭尔| 上思县| 资兴市| 托克逊县| 杨浦区| 深州市| 荆门市| 武宣县| 石渠县| 上思县| 濉溪县| 遂溪县| 马山县| 兴城市| 凌海市| 固始县| 沂南县| 西青区| 米林县| 本溪市| 辽源市| 积石山| 尚志市| 东明县| 邢台市| 滨海县| 瓮安县| 兴山县| 奇台县| 特克斯县| 余姚市| 哈尔滨市| 固安县| 黑河市| 丁青县| 云安县| 星子县|