title: Analytical performances of two liquid crystals and their mixture as stationary phases in capillary gas chromatography.
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.
authors.affiliation: Laboratoire de Chromatographie, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediéne, B.Y 32, El-Alia, Bab-Ezzouar, Alger, Algeria.
authors.forename: D
authors.initials: D
authors.lastname: Bélaïdi
authors.forename: S
authors.initials: S
authors.lastname: Sebih
authors.forename: S
authors.initials: S
authors.lastname: Boudah
authors.forename: M H
authors.initials: MH
authors.lastname: Guermouche
authors.forename: J P
authors.initials: JP
authors.lastname: Bayle
mesh_terms: D002152:Calorimetry, Differential Scanning; D002849:Chromatography, Gas / Q000379:methods*