胆甾型冠醚液晶固定相分离丁醇碳链异构体的GC研究

doi:10.3863/j.issn.1000-2634.1997.03.017

西南石油大学学报(自然科学版) ›› 1997, Vol. 19 ›› Issue (3): 86-88.DOI: 10.3863/j.issn.1000-2634.1997.03.017

胆甾型冠醚液晶固定相分离丁醇碳链异构体的GC研究

卿笑天¹　张波¹　唐英²
　

1.川北医学院化学教研室,四川南充637007　2.重庆师范专科学校化学系

收稿日期:1996-12-19 修回日期:1900-01-01 出版日期:1997-08-20 发布日期:1997-08-20
通讯作者: 卿笑天

The Separation of Carbon Chain Isomers of Butanols with CH-B-15-C-5 asStationary Phase

Qing Xiao-tian¹ Zhang Bo¹ TangYing²

( Dept. of Chemistry, North Sichuan Medical College, Sichuan, 737007 )

Received:1996-12-19 Revised:1900-01-01 Online:1997-08-20 Published:1997-08-20
Contact: Qing Xiao-tian

摘要/Abstract

摘要： 以4-胆甾烯氧羰基苯并-15-冠-5(CH-B-15-C-5)涂渍于硅烷化102白色担体
上作为一种新型的GC固定相,对几种丁醇碳链异构体的气固色谱(GSC)、普通气液色谱(GLC)和冠醚液晶气液色谱(CL-GLC)的分离效果进行了比较研究,并探讨了分离机理。经对CH-B-15-C-5柱的麦克雷诺相常数的测定可知,该柱的极性中等偏弱。在CL-GLC体系中,CH-B-
15-C-5是排列有序的冠醚液晶状态,因此在相同条件下,CL- GLC的分离度高于GLC的分离
度,所得色谱峰形亦很好。我们认为体系中固定相分子是否排列有序对有机化合物的保留行为具有重要作用。实验表明,在柱温为70-150℃的范围内,对丁醇碳链异构体的分离均能获得满意效果。如果采用CL-GLC法分离较高沸点的有机化合物,则柱温度还可升高。一般认为GSC的分离属吸附机理,用吸附等温线来描述固定相表面的吸附状况,GSC的吸附等温线往往是非线性关系,故常得到非对称峰。该柱所得GSC图均为对称色谱峰,这一实验结果提示人们,在GSC的分离机制中,除吸附机理之外还应考虑其它因素。我们认为CH-B-15-C-5经高温处理后在
125℃以下为排列整齐有序的固态晶体,是GSC法获得对称峰的重要原因。

关键词: 液晶, 气相色谱法, 异构体

Abstract: A comparison study was made on the separation of carbon chain isomers of butanols with CH-B-15-C-5 as stationary phase in GSC, GLC and CL-GLC. The results of separation and the chromatographic characteristics of CH-B-15-C-5 are discussed. By determining the Mcreyoids phase constants, the polarity of the CH-B-15-C-5 column was known to be moderate to weak. In the CL-GLC system, CH-B-15-C-5 oc-curred as orderly arranged ether liquid crystals, and therefore, under similar experimental conditions, the resolu-tion of the CL-GLC was higher than that of the GLC, with the chromatographic peaks of the former also betterdefined. We presume that whether or not the stationary phase molecules are in ordered arrangement in the system has great impact on the retention behavior of organic compounds.

Key words: Liquid crystal, Gas chromatography, Isomer

中图分类号:

O652.4

卿笑天　张波　唐英　. 胆甾型冠醚液晶固定相分离丁醇碳链异构体的GC研究 [J]. 西南石油大学学报(自然科学版), 1997, 19(3): 86-88.

Qing Xiao-tian Zhang Bo TangYing. The Separation of Carbon Chain Isomers of Butanols with CH-B-15-C-5 asStationary Phase[J]. 西南石油大学学报(自然科学版), 1997, 19(3): 86-88.

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胆甾型冠醚液晶固定相分离丁醇碳链异构体的GC研究

The Separation of Carbon Chain Isomers of Butanols with CH-B-15-C-5 asStationary Phase

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