Synergistic effect of heptakis(2,3,6-tri-o-pentyl)-β-cyclodextrin and o-methyl-p-phenylene-bis-(p-Heptoxy Benzoate) mixed stationary phase in capillary gas chromatography

The separations for benzene-cyclohexane, cyclohexane-hexane, halogen hydrocarbons, anomatics, phenol, and alcohol on heptakis(2,3,6-tri-o-pentyl)-β-cyclodextrin and o-methyl-p-phenylene-bis-(p-heptoxy benzoate) liquid crystalline mixed stationary phase in capillary gas chromatography are carried out. It is observed that the chromatographic retention properties for most of the pairs tested on the mixed stationary phase are not the simple addition of 2 pure phases. These facts show that there exists a synergistic effect in the mixed stationary phase. This effect depends on the mixing ratio of mixed stationary phases and the linear velocity of the carrier gas.