The retention gap technique in combination with on-column injection allows concentration of a large sample volume in the capillary column. Retention gaps consist of uncoated (no stationary phase), deactivated fused silica capillary tubing. A retention gap must be inert without any noticeable retention (analytes are not retained). Phenylmethyl (low-medium polar) deactivated tubing as an additional choice of surface deactivation. Improve peak shape by focusing and concentration of the sample components when introducing a large sample volume onto the column.
|Method||Gas chromatography (GC), accessories|
|Capillary outer diameter||0.4 mm (0.25 mm ID) - 0.5 mm (0.32 mm ID) - 0.8 mm (0.53 mm ID)|
|Suitable solvents||Many solvents, nonpolar and mid-polar, but not with methanol and water|
|Recommended application(s)||Improve peak shape by focusing and concentration of the sample components when introducing a large sample volume onto the column|
|Temperature stability (max)||320 °C|