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

• CD Type: α (alpha)
• Derivative: Trifluracetyl
• Tep. Liits: -10 °C t 180 °C (istheral r prgraed)

Incrprates a phase cnsisting f a 2,6-di-O-pentyl-3-trifluracetyl derivative f α-cycldextrin.

Trifluracetylatin f the 3 psitin hydrxyl grups after pentylatin f the 2,6 hydrxyl grups creates a phase with high selectivity fr xygen cntaining analytes in the fr f alchls, ketnes, acids, aldehydes, lactnes, and halgenated cpunds.

Features:

• Separates the widest variety f enantiers
• Separates the greatest nuber f enantiers
• Gaa re selective than beta fr
• Unique retentin behavir
• Extrardinary versatility and chiral selectivity

Analytes:

Useful fr hlgus series f:

• Ain acids (priary, secndary, aratic and aliphatic)
• Aines (priary, secndary, cyclic, aratic and halgenated)
• Ain alchls
• Alkanes, hydrgenated alkanes
• Alchls (aliphatic and aratic)
• Acids (halgenated and hydrxy)
• Esters (aratic, aliphatic, hydrxy, di-ester)
• DilsLactnesKetnes
• Phthalides
• Sulfxides

Mechanis Observatins:

• Strng diple-diple interactins
• Lnger alkyl chain; greater retentin; increase in enantiselectivity up t C4/C5
• Halgens knwn t favr cavity interactin

Diple-diple interactins are cnly identified in the echanis f separatin fr TA phases. In a hlgus series f alkane enantiers, identical alpha values are bserved regardless f chain length r branching indicating nly 1 r 2 carbns ay be cntributing t chiral recgnitin. Alpha values are greatly affected by size and plarity f the head grup. Functinal grups like epxides, ain alchls and alchls can dictate the cycldextrin selectin. Aldehydes, carbxylic acids and epxides separate better n the gaa while alchls, alchl aines and ther linear lecules separate better n the beta derivative.

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

訂貨信息：

Astec CHIRALDEX A-TA

17。。ｃｎ