Metrohm 761 Compact IC - Manual (Page 41)

2.7 Precolumns and separating columns
761 Compact IC
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2.7 Precolumns and separating columns
2.7.1 General information on precolumns
The use of easily exchangeable precolumns protects the separating
columns and prolongs their lifetime. The precolumns available from
Metrohm (see section 6.3.2) are either real precolumns or precolumn
cartridges, which are used together with the 6.2821.040 Cartridge head
or the 6.2828.010 Precolumn cartridge holder.
New IC precolumns are normally filled with solution and sealed at both
ends. Before the precolumn is installed in the system, it must be
ensured that this solution is freely miscible with the eluent used
(check manufacturer's specifications).
2.7.2 Precolumns with cartridge head
The 6.1005.020, 6.1005.040, 6.1005.050, 6.1007.010 and 6.1010.010
Precolumn cartridges are installed in the 6.2821.040 Cartridge head as
follows (see Fig. 12):
1 Prepare separating column
• Remove end caps from separating column 81.
• Unscrew fastening screw from column inlet.
• Take steel connector 74 for ferrule out of fastening screw.
2 Install cartridge
• Remove end caps for precolumn cartridge 77 (the steel mesh
76 and gaskets 75 are already installed in the cartridge).
• Mount steel spacer 78 on Manufit pressure screw 80 (the
steel mesh 79 and gaskets 75 are already installed in the
pressure screw).
• Mount precolumn cartridge 77 on the steel spacer 78 (com-
ply with flow direction if specified on the precolumn).
• Screw Manufit pressure screw 80 firmly to separating column
81.
• Mount steel connector 74 for ferrule on the inlet side of the
precolumn cartridge 77.
• Screw on Manufit housing 73 with Manufit pressure screw 80.