A new approach of preparingmonolithic silica column was founded by adopting an improved solgel technology with tetramethoxy silane and polyethylene glycol as the matrix materials. The reason of resulting in crack and deformation of monolith ic column was explained. By using N, N-dimethylformam ide and a heat treatment procedure, the problems of crack and deformation in preparing the column were solved and the drying time was shortened greatly. In addition, the methods of fabricating mesopore and the effects of porogen solvent of different concentrations on monolith ic silica column were investigated. The results show that the column prepared possessed bimodal pores structuresw ith micrometer-size co-continu-ous through-pores and silica skeletons which have nanometer-size mesopores, straight appearance, high porosity, good chemical and mechanical stability. The characteristics would favour the separation with a rapid speed and high efficiency for both smallmolecules and macromolecules.

A novel concocting method to convert Triptolide (T) into Tripchlorolide (T4) in the traditional Chinese herb Tripterygium wilfordii Hook F. and a micellar electrokinetic capillary chromatographic (MEKC) approach by which the conversion of Triptolide (T) and Tripchlorolide(T4) was identified and determined had been established. Investigations of the influence of different pH values of boric acid and borax buffer and of sodium dodecyl sulfate (SDS) and organic additive concentrations had been carried out, and the optimum separation for T and T4 was achieved using boric acid and borax of pH 7.0 with 30mM SDS and 20% (volume ratio) methanol as the running buffer. It was found that MEKC exhibited good accuracy, precision and repeatability and the content of T4 was greatly increased in the herb that was treated by the new concocting method.

A new chiral stationary phase for nateglinide (N-(trans-4-isopropylcyclohexylcarbonyl)-D-phenylalanine) based on a molecularly imprinted polymer has been prepared by non-covalent imprinting. For chromatographic analysis the effects on the separation of mobile phase composition, flow rate, and temperature were investigated, and the optimum conditions for HPLC were shown to be: mobile phase, acetonitrile; flow rate, 0.5mL min-1; temperature, 25℃. It was shown that the nateglinide-imprinted polymer was capable of recognizing the enantiomeric difference between nateglinide and its L enantiomer, whereas the non-imprinted polymer had no such ability. Scatchard analysis was used to investigate the binding characteristics of the nateglinide-imprinted stationary phase; this indicated that two classes of binding site were present in the imprinted polymer. The equilibrium dissociation constant (KD) and the apparent maximum number (Qmax) of high-and low-affinity binding sites were 3.7×10-4mol L-1 and 11.38µmol g-1, and 1.81×10-3mol L-1 and 27.73µmol g-1,respectively.

以手性药物那格列奈为模板分子，采用原位聚合法制备了具有特定识别性能和手性拆分能力的分子印迹聚合物，并用作高效液相色谱固定相实现了那格列奈与其对映体的手性拆分。通过静态结合方法考察了该聚合物的选择结合能力，并讨论了手性分离过程中的热力学性质。结果表明，原位聚合法制备的棒状聚合物固定相对模板分子及其对映体有很好的手性拆分性能。