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中文摘要：
以硅酸钾为硅源,甲酰胺为催化剂在毛细管内原位聚合形成干凝胶柱,制备了一系列致密度不同的整体柱。该法在柱制备及高温干燥过程中不会发生柱床断裂和塌陷现象,此特点明显优于以烷氧基硅烷为前驱体制备无机整体柱的方法。考察了不同模数硅酸钾对整体柱柱床结构的影响,用扫描电镜（SEM）和氮吸附法对整体柱结构进行了表征,考察了整体柱柱压与流速的关系;对整体柱进行十八烷基修饰后,测定了反相整体柱（C18整体柱）对蒽的柱效,通过考察甲苯在该柱上的突破曲线,获得了其对甲苯的柱容量。结果显示该整体柱柱床刚性好,在高温、高柱压、高流速时柱床能保持其物理结构的稳定性,对蒽的柱效达到41 400理论塔板/m,对甲苯的柱容量为61 ng。
英文摘要：
Using potassium silicate as silicon source,formamide as catalyst,a series of silica xerogel monolithic columns with different consistencies were prepared.The column bed would not rupture and collapse during drying at high temperatures.This is the biggest advantage compared with the inorganic monolithic columns using alkoxy silane as precursor.The effect of the modulus of potassium silicate on the physical structure of the monolithic column was investigated.The monolithic silica columns were characterized by scanning electron micrograph（SEM） and nitrogen adsorption.The relationship between column pressure and flow rate was evaluated.The column efficiency for anthracene was tested.The breakthrough curve for toluene was studied.The results showed that the column bed could maintain good stability at high temperatures,high column pressures,and high flow rates. The column efficiency of 41 400 plates/m was achieved for anthracene.The column capacity for toluene was 61 ng.
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