New Gc Capillary Column Preparation And Its Application

The thesis includes the following five sections:1. The development of gas chromatography (GC) and the preparation of the fused-silica capillaries were descried. The cyclodextrin derivatives used as the 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 phases in static method, respectively.3. Two compounds thiacrown and aza cryptand used as GC stationary phases exhibited well film-formability and fine chromatographic property. The open tubular column containing 15% thiacrown in OV-1701 evaluated a thermo-stability below 185 @ and 15% aza cryptand in OV-1701 below 120@ in GC. The general selectivity toward the benzene/cyclohexane, aromatics, alcohol and aniline derivatives had been demonstrated.4. Mixed stationary phase containing of 2,3,6-tri-mentyl-p-CD (I) and 2,3,6-tri-pentyl-p-CD (II) was investigated in fused-silica capillary. By studying the chromatographic characteristics of the mixture and its selectivity for different chiral compounds and positional isomers as well as comparing with the CD derivatives used as individual stationary phase, the synergistic effect was observed on mixed stationaryphase.5. The separation of formaldehyde, benzols, acetates and phenols in waste water and sewage had been carried out on mixed stationary phase (I+II). The experimental result showed that this method is very useful.