DESCRIPTION
Even if the Dual-4 columns based on monolithic silica gel are very durable, the use of the Dual 4 guard column is advised in order to further increase the safety of the analytical separation column. The Dual 4 guard column is a PEEK cartridge which is also filled with monolithic silica gel. This cartridge is easy to replace and is screwed directly onto the analytical column in an aluminum holder. The proven \"On Column Guard System\" is simple to use and also offers the advantage of minimal dead volume.