6 Maintaining the Purged Packed Inlet
To Install a Packed Glass Column
98 Maintaining Your GC
8 Withdraw the column 1 to 2 mm from both the inlet and detector. Finger-tighten both
column nuts.
Overtightening the column nut or forcing it to bottom in either the inlet or detector may
shatter the column.
9 Tighten both column nuts 1/4 turn with a wrench.
10 Press Settings > Configuration > Columns, then select Columns 1 through 6. Select
Column Type > Packed, then choose your Inlet and Outlet Connection to identify the inlet
and detector to which the column is attached.
11 Scroll down to manually set your column temperatures.
12 Exit maintenance mode. Select Maintenance > Instrument > Perform Maintenance >
Maintenance Mode > Finished.
13 Establish a flow of carrier gas and purge as recommended by the packing manufacturer.
Generally:
• 20 to 30 mL/min for 2-mm id glass or 1/8-inch od metal columns
• 50 to 60 mL/min for 4-mm id glass or 1/4-inch od metal columns
14 Restore the analytical method.
• For FPD+, immediately turn off the flame.
• For NPD, immediately turn off the bead.
15 After the GC becomes ready, wait 10 minutes then ignite the detector flame or adjust
offset on the NPD bead.
Be careful! The oven, inlet, and/or detector may be hot enough to cause burns. If the oven,
inlet, or detector is hot, wear heat-resistant gloves to protect your hands.
16 Allow the oven, inlet, and detector to equilibrate at operating temperature, then retighten
the fittings.
17 Perform the inlet Leak & Restriction test and reset the maintenance counters.
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