欧美一区二区在线观看_欧美性受XXXX黑人XYX性爽_欧美视频一区二区三区

🉐 𒀰 产物列表PRODUCTS LIST

SUPELCO Astec CHIRALDEX B-PH手性气相色谱柱 毛细管柱

扼要描写：

SUPELCO Astec CHIRALDEX B-PH手性气相色谱柱 毛细管柱
Supelco（色谱(pu)科）位于美(mei)国宾夕(xi)法尼亚州，是(shi)Sigma-Aldrich团体部属的(de)(de)子品牌，Supelco一(yi)向经由过程供给更新的(de)(de)，更靠(kao)得住的(de)(de)色谱(pu)产(chan)物(wu)和(he)来赞(zan)助(zhu)色谱(pu)任务者来处(chu)理题目，其触🔴及的(de)(de)范畴(chou)和(he)行(xing)业有情况、食物(wu)、饮料(liao)、当局、医药、化工(gong)等

在线留言

SUPELCO Astec CHIRALDEX B-PH手性气相色谱柱 毛细管柱
 

  • CD Type: β (beta)
  • Derivative: S-Hydroxypropyl
  • Temp. Limits: -10 °C to 200 °C (isothermal) or 220 °C (programmed)
    Incorporates a phase consisting of a (S)-2-hydroxy propyl methyl ether derivative of β-cyclodextrin. This phase separates a wide variety of enantiomers, resolving aliphatic, olefinic, and aromatic enantiomers. It is a good general purpose chiral column.    The first general purpose derivative involved substitution of the cyclodextrin hydroxyl groups with pure "S" hydroxypropyl followed by permethylation. The surface is hydrophilic in character and the influence of size and shape selectivity is greatly reduced but not absent. The beta-cyclodextrin* form has the broadest applicability.

Features: 

  • Hydrophilic surface
  • Beta is more selective than alpha
  • Separates a wide variety of enantiomers
  • Resolves aliphatic, olefinic and aromatic enantiomers
  • Good general purpose chiral column
 

Mechanism Observations:

  • Reduced influence of inclusion complexing
  • Less size selectivity for PH as opposed to DA
  • Temperature range for enantiomeric selectivity: Isothermal to 200°C; temperature program to 220°C
  • Characteristic temperature selectivity on a given column for a given class of compounds
  • Fewer functional requirements for analyte than LC
 

SUPELCO Astec CHIRALDEX B-PH手性气相色谱柱 毛细管柱 定货产品信息：

Product #Description
71023ASTAstec CHIRALDEX B-PH 毛细管气相色谱柱 L × I.D. 30 m × 0.25 mm, df 0.12 μm