Guard Columns

Biocompatible ZIC-HILIC (Hydrophilic Interaction Chromatography) columns contain a zwitterionic stationary phase and protect analytical or preparative columns from contamination by material that may have precipitated in solution and the retention of materials that may be irreversibly retained on the column. The guard columns provide have a smaller internal diameter than analytical columns: their use does not lead to any loss in overall separation efficiency or to any significant increase in analysis time. Column design is optimized to reduce dead volumes and prevent extra column band broadening. The columns are available in a variety of sizes.