Preparation of Capillary Gas Chromatographic Columns for Separationof Polar Organic Compounds by Sol-Gel Method
溶胶-凝胶法制备用于分离极性有机化合物的毛细管气相柱

A sol-gel method was used in preparing capillary gas chromatographic columns with simplicity and rapidity. Due to the formation of the chemical bonds between the coating layer and the inner wall of the capillary, the thermal stability of the column was greatly increased. The sol-gel poly(dimethyl-siloxane) (PDMS) column was able to withstand temperatures as high as 400 degrees C. This column showed excellent separation of free fatty acids, amines, and other polar compounds. The sol-gel column also showed good repeatability of retention time on a single column as well as good repeatability of capacity factor, column efficiency, symmetry and McReynold's constant on several columns of the same type.