How to Change a Frit 怎样更换滤头Column Inlet Frit 柱进口滤头Column Body 柱身Compression Ferrule 压缩金属套圈Wear gloves 戴手套Do not allow bed to dry 不要让底座干燥Do not touch the column-body heat will extrude packing 不要使柱身受热,否则填料会喷出Do not over tighten 不要旋得太紧Female End Fitting 旋好尾端螺母Male End Fitting 旋好尾端螺头Preventing Back Pressure Problems 压力问题的预防Use column protection 柱保护 - Guard columns 保护柱/预柱 - In-line filters 在线过滤器 Sample Preparation 样品预处理Appropriate column flushing 适当的柱冲洗Filter buffered mobile phase 过滤缓冲流动相