色谱

色谱

• 研究论文 • 上一篇    下一篇

新型苯基桥键色谱固定相的热力学性质

吴利平1,2, 连东2,3, 张庆合2*, 李红梅2   

  1. 1. 化工资源有效利用国家重点实验室, 北京化工大学, 北京 100029; 2. 中国计量科学研究院, 北京 100013; 3. 中国地质大学(北京), 北京 100083
  • 收稿日期:2010-02-03 修回日期:2010-04-03 出版日期:2010-07-28 发布日期:1980-03-25
  • 通讯作者: 张庆合

Thermodynamic properties of novel phenylene-bridged periodic mesoporous organosilica as high performance liquid chromatographic stationary phase

WU Liping1,2, LIAN Dong2,3, ZHANG Qinghe2*, LI Hongmei2   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Tecnology, Beijing 100029, China; 2. National Institute of Metrology, Beijing 100013, China; 3. China University of Geosciences, Beijing 100083, China
  • Received:2010-02-03 Revised:2010-04-03 Online:2010-07-28 Published:1980-03-25
  • Contact: ZHANG Qinghe

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421

被引次数

2

摘要： 将制备的球形苯基桥键型杂化介孔色谱固定相与商品化的C18和苯基键合硅胶固定相对比,研究其热力学性质。以稠环芳烃为例,探讨了溶质在固定相和流动相之间的迁移焓变、迁移熵变等热力学参数的变化。结果表明,与两种商品化的固定相不同,实验制备的苯基桥键固定相不存在明显的焓-熵补偿效应,证实新型桥键固定相分离机理是疏水作用、π-π作用、包结作用等协同作用的结果。

关键词: 保留机理, 苯基桥键, 焓-熵补偿, 介孔材料, 色谱固定相

Abstract: The thermodynamic properties of spherical phenylene-bridged periodic mesoporous organosilica (PMOs) as high performance liquid chromatographic stationary phase were investigated and compared with commercial grafted C18 and phenyl stationary phases. The retention behavior of several compounds of polycyclic aromatic hydrocarbons (PAHs) was investigated. The thermodynamic parameters of transfer from mobile phase to stationary phase were discussed. The results showed that the enthalpy-entropy compensation effect does not exist for homemade phenylene-bridged PMOs. The retention mechanism of solutes on the prepared stationary phase involves synergistic interaction of hydrophobic, π-π and inclusion interactions, which is different with that on the commercial stationary phases.

Key words: chromatographic stationary phase , enthalpy-entropy compensation, periodic mesoporous organosilica, retention mechanism, phenylene-bridged