New stationary phases for gas chromatography based on polymers with intrinsic porosity.

Norbornene polymers with intrinsic porosity were investigated as candidates for polymeric stationary phases in capillary GC. Kinetic and thermodynamic characteristics of the stationary phases were evaluated and turned out that only polymer with vicinal distribution of trimethylsilyl groups (polymer II) provided properties making it potential candidate for application in capillary GC. Columns with stationary phase based on polymer II demonstrated unique selectivity, moderate thermostability and efficiency better than previously studied columns with stationary phase based on poly[(1-trimethylsilyl)-1-propine].

Application of kinetic plots in gas and liquid chromatography for the optimization of separation conditions.

This review describes the recent achievements and historical background of investigations in optimization procedures in gas and liquid chromatographic techniques. The optimization parameters are varied depending on researcher interests and may include separation efficiency, analysis time, column operation pressure, packing characteristics, etc. As it is shown the kinetic performance limit is one of the most used and vital concepts for gas and liquid chromatography.