Maintaining the COC Inlet 7
Maintaining Your GC 127
10 Tighten the column nut an additional 1/4 turn with a wrench
or until the column does not move.
11 If using an automatic injection system with a 0.25-mm or
0.32-mm column, verify that the column installation by
manually pushing the syringe into the inlet.
12 Configure the new column.
13 Condition the column per the manufacturer’s
recommendation. (See To Condition a Capillary Column.)
14 Install the column into the detector. See:
• To Install a Capillary Column in the FID
• To Install a Capillary Column in the NPD
• To Install a Capillary Column in the TCD
• To Install a Capillary Column in the µECD
15 After the column is installed at both inlet and detector,
establish a flow of carrier gas and purge as recommended by
the column manufacturer.
16 Restore the analytical method.
• For FPD, immediately turn off the flame.
• For NPD, immediately set the bead voltage to 0.0.
17 After the GC becomes ready, wait 10 minutes then ignite the
detector flame or adjust offset on the NPD bead.
18 Allow the oven, inlet, and detector to equilibrate at operating
temperature, then retighten the fittings.
19 Reset the column EMF counters. See To Reset an EMF
Counter in the Operation Manual.
WARNING
To avoid bending the inlet, always use two wrenches. Use a
5/16-inch wrench to support the inlet while tightening the column
nut with a 1/4-inch wrench.
WARNING
Be careful! The oven, inlet, and/or detector may be hot enough to
cause burns. If they are hot, wear heat-resistant gloves to protect
your hands.
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