【摘要】 <正> 把具有适当相变温度的液晶化合物用作色谱固定液,可以有效地分离近沸点的二元取代苯异构体和多环芳烃异构体等难分离混合物,前人在这方面已经作了许多工作。但是,一个至今尚未解决的问题是,由于液晶本身的固有特性,制备性能良好的毛细管柱比较困难,本文为解决这一问题进行了初步尝试。更多还原

【Abstract】 HCl-etchecl, BaCO3-deposited and support-coated glass capillary columns coated with liquid crystal MPBHxB were prepared and applied to separate five di-substituted isomers of benzene. The efficiency, stability and selectivity were studied on these columns. The results indicate that HCl-etched MPBHxB column is easily prepared, relatively stable and highly-effecient in separating power.更多还原