Sol−Gel Poly(ethylene glycol) Stationary Phase for High-Resolution Capillary Gas Chromatography

摘要: A sol−gel chemistry-based method was developed for the preparation of highly stable capillary gas chromatography (GC) columns with surface-bonded poly(ethylene glycol) (PEG) stationary phase. Through a single-step procedure, it concurrently provided column deactivation, stationary-phase coating, and chemical immobilization coated film. Sol−gel reactions were carried out within fused-silica capillaries that filled properly designed sol solutions containing two precursors, different triethoxysilyl-derivatized glycol)s, catalysts, deactivation reagent. Hydrolytic polycondensation led to formation coating chemically bonded inner walls capillary. number prepared using sol−gel-active PEG derivatives. These demonstrated many inherent advantages, main being strong anchoring wall resulting from bonding ...