Capillary Gas Chromatography New Stationary Phase In Research And Application

The thesis includes the following five sections:1. The development of gas chromatography (GC) and preparation of the fused-silica capillaries were descried. The cyclodextrin derivatives used as the stationary phase and the synergistic effect on mixed stationary phase in GC were reviewed. The application of GC in environment monitoring was presented.2. The inner surface of the capillaries was roughened by precipitating sodium chloride suspension. The columns were coated with polar, weakly polar, and non-polar stationary phase in static method, respectively.3. Three cyclodextrin derivatives (CDs) with amino acid bulky functional groups were used as capillary GC stationary phases. The separation properties of these CDs were investigated compare with their matrix , showing that they all possess good filmforming properties and fine separation abilities to benzene isomers. The results also indicate that many factors, including cyclodextrins cavity , substituted groups , the polarity , the size and π-π interactions, played an important roles in the separation of positional isomers .4. Mixed stationary phase containing of cyclosporin A and valinomycin was investigated in fused-silica capillary. By studying the chromatographic characteristics of the mixture and its selectivityfor different chiral compounds and positional isomers as well as comparing with the cyclosporin A and valinomycin used as individual stationary phase, the synergistic effect was observed on mixed stationary phase.5 The separation of pesticide, benzols and phenols in environment sample had been carried out on mixed stationary phase. The experimental result showed that this method is very useful.