共查询到19条相似文献,搜索用时 78 毫秒
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介绍了以Eupergit C 250L为载体,L-羟脯氨酸盐为手性配体,通过两者间的"一步交联反应",制备出一种新型的Eupergit手性配体交换固定相。交联反应过程简单、高效、副反应少。尝试通过此大颗粒的Eupergit手性配体固定相对丝氨酸手性对映异构体进行拆分,得到了良好的拆分结果。为将来在工业领域内,通过使用制备型拆分柱来拆分手性氨基酸的设想提供了有利的技术支持。 相似文献
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用手性色谱柱chiral-AGP为分离柱、乙腈 -磷酸盐水溶液为移动相分离反式 - 4- (4-氟苯基 ) - 3- {[3,4(甲二氧基 )苯氧基 ]}-哌啶对映体。初步考察了移动相pH、离子强度、乙腈比例对容量因子k′ ,和选择性因子α的影响。结果表明 ,保留值基本遵从反相色谱规律。 相似文献
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合成了苯甲酰化β-环糊精键合固定相,用元素分析和红外光谱对固定相进行了表征。该固定相在正相和反相条件下对某些对映异构体有良好的拆分能力。 相似文献
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手性固定相是液相色谱手性分离的基础与核心。本文用简单缩聚法合成环糊精聚合物(CDP),并将这种CDP键合到自制二氧化硅微球上,合成了新型的环糊精聚合物键合型手性固定相(CSP)。在合成过程中考察了反应时间,原料比例及原料加入次序对所制CSP的影响。随后,用扫描电镜法检验了所制填料圆整度,用四氮唑蓝法检测环糊精的含量为42.4 μmol/g,其环糊精键合量明显高于CD单体键合硅胶。最后将最优条件下得到的手性填料用高压匀浆法装柱,并进行液相色谱法拆分手性药物。用二者与ODS在相同的色谱条件下进行对比,结果表明:环糊精聚合物键合硅胶手性固定相对所选手性药物拆分能力更强。 相似文献
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用简单缩聚法合成β-环糊精聚合物(β-CDP),并将其键合到自制二氧化硅微球上,合成新型的环糊精聚合物键合型手性固定相(CSP)。合成过程中考察了反应时间、原料比例对所制CSP的影响。用扫描电镜法检验了β-CDP键合硅胶圆整度,以四氮唑蓝法检测环糊精的含量为42.4μmol/g,其环糊精键合量明显高于β-CD单体键合硅胶。最后,将最优条件下得到的手性填料用高压匀浆法装柱,并进行液相色谱法拆分手性药物。将二者与ODS在相同的色谱条件下进行对比,结果表明,环糊精聚合物键合硅胶手性固定相对手性药物拆分能力更强。 相似文献
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《分离科学与技术》2012,47(2):360-369
Ionic liquid-modified stationary phases are an important class of stationary phase. They have been shown to have a capability of separating various classes of compounds in HPLC. In this review, we focus on the preparation and application of ionic liquid-modified stationary phases in HPLC. First, two common theories of retention mechanism in the ionic liquid-modified stationary phases in HPLC were discussed. Then, the preparations of two important types of stationary phase, ionic liquid-modified and poly(ionic liquids)-grafted silicas, were illustrated. Finally, applications of the ionic liquid-modified stationary phases in HPLC were reviewed, giving regard to the varieties of compounds separated or analyzed. 相似文献
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Ibprofen is widely used as a non-steroidal anti-inflammatory drug and poduced as racemic mixture.Its pharmacological activity resides only is S-( )-enantiomer,and R-(-)-enantiomer is not only inactive but also has many side effects.Thus it is necessary to separate Renantiomer from racemic ibuprofen.We studied optical separation of racemic Ibuprofen with chiral high performance liquid chromatography(HPLC).,Out of three different chiral stationary phases,which were selected on the basis of structure and availability,two were found to be effective.There was optimum eluent composition for each stationary phase for good resolution in optical separation.Resolution decreased with increase of eluent flow rate,but effect of injection volume on resolution was insignificant at high eluent flow rate. 相似文献