A retention gap must be inert without any noticeable retention
Me-Sill retention gap only for use with n-hexane and diethyl ether
Persil retention gap for all solvents except methanol and water
CW retention gap for all solvents and especially for methanol and water
وصف
The retention gap technique in combination with on-column injection allows concentration of a large sample volume in the capillary column. Choice of the retention gap depends on the solvent used: the flooded zone after injection should be between 20–30 cm/µL.