Analytical performances of two liquid crystals and their mixture as stationary phases in capillary gas chromatography |
| |
Authors: | Bélaïdi D Sebih S Boudah S Guermouche M H Bayle J P |
| |
Institution: | Laboratoire de Chromatographie, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediéne, B.Y 32, El-Alia, Bab-Ezzouar, Alger, Algeria. |
| |
Abstract: | Comparative gas chromatographic applications of two new liquid crystals called LCa and LCb and their equimolar mixture LC(a+b) were investigated. The thermal properties of LCa, LCb and LC(a+b) were established with differential scanning calorimetry (DSC) and polarizing microscopy. Differential scanning calorimetry of LC(a+b) showed that the melting or clearing temperature was intermediate between the corresponding temperatures of the pure compounds. Polarizing microscopy showed that the liquid crystal phase of A + B was nematic. The chromatographic separation abilities LCa, LCb and LC(a+b) were studied using fused silica capillary columns. Interesting analytical performances were obtained: isomeric separation of aromatics, polyaromatics, phenols. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|