硅胶整体柱制备条件的优化及性能评价

制备了一种良好通透性的无机硅胶整体柱,并用扫描电子显微镜和比表面积测试仪对其进行了表征.利用正己烷为流动相,考察了该整体柱的流速与渗透率和流速与柱压降的关系,以及苯取代化合物在该整体柱上的色谱保留行为.结果表明,该硅胶整体柱具有渗透率和机械强度高、化学稳定性好、吸附性强等特点.

Synthesis and evaluation of silica monoliths

In this paper, a silica monolith was prepared as the promising candidate for HPLC separations.Characterization of prepared silica monolith was performed with scanning electron microscopy and surface area machine.Its chromatographic properties were evaluated by using toluene and phenol as samples while n-hexane as the mobile phase.Permeability and column pressure drop were evaluated for separation, and the possible separation mechanism was also investigated in the paper.The results showed that the silica monolith had characters of high permeability, high mechanical strength, good chemical stability and strong absorption capability.