Maintaining the Purged Packed Inlet 6
Maintaining Your GC 91
9
Load the GC maintenance method and wait for the GC to
become ready.
10 If required, install the detector adapter. (See “To Install a
Packed Column Adapter on a Detector Fitting” on
page 92.)
11 Attach the column to the detector or detector adapter.
Finger- tighten the nut.
12 Tighten the nut an additional 1/4 turn with a wrench (for
a 1/8- inch column) or an additional 3/4 turn (for a
1/4- inch column).
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 set the bead voltage to 0.0.
15 After the GC becomes ready, wait 10 minutes then ignite
the detector flame or adjust offset on the NPD bead.
16 Allow the oven, inlet, and detector to equilibrate at
operating temperature, then retighten the fittings.
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.
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.
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