摘要
以合成的新型胆甾酯类侧链聚硅氧烷高分子液晶作固定液 ,涂渍在弹性石英毛细管柱上 ,获得了具有较高的柱效和选择性、良好的热稳定性、适于分离多种异构体混合物的毛细管柱。
A new stationary phase,side chain liquid crystalline polysiloxane, was obtained and used in capillary column gas chromatography Two kinds of side chain polysiloxane, PSI 5 and PSI 6, were characterized by polarized light microscopy (POM), differential scanning calorimetry (DSC) and X ray diffraction and proved to be smectic phase Sc Two fused silica capillary columns (0 25 mm i d ) were coated with 5 g/L solutions of PSI 5 and PSI 6 in dichloromethane by the static method, named column I5 and column I6 Numbers of theoretical plate were 1?598/m 2?423/m (I5) and 3?191/m 4?235/m (I6) for anthracene at 200 ℃ 240 ℃. These columns showed wide operation temperature range (I5:50?℃ 200?℃;I6:100?℃ 260?℃), outstanding thermostability and weak polarity These columns exhibited unique selectivity for many organic compounds,especially positional isomers For example,the mixtures of anthracene,phenanthrene and fluorene were well separated on column I5 and I6;dimethyl benzene isomers were well separated on column I5,but they were not separated on column I6;dimethyl phenol isomers were well separated on column I5,but they were not wholly separated on column I6 The different selectivities of these columns are mainly due to the different chemical structures
出处
《色谱》
CAS
CSCD
北大核心
2001年第3期264-267,共4页
Chinese Journal of Chromatography
基金
国家自然科学基金!资助课题 (批准号 2 98740 2 0 )
关键词
毛细管柱气相色谱
胆甾酯
侧链聚硅氧烷液晶
固定相
capillary column gas chromatography
cholesteric ester
side chain liquid crystalline polysiloxane
stationary phase
