Columns and Traps
Installing packed metal columns
Released: March 2004 6850 Series II GC User Information page 44 of 256
4. Install the adapter, if needed. See Table 15.
Table 15. Fittings for 1/4-in. and 1/8-in. Packed Metal Columns
5. Install the column. (See “Installing packed metal columns” on page 48.)
6. Establish a flow of carrier gas through the inlet. Heat the oven, inlet, and
detector to operating temperatures. Allow them to cool, and then retighten
the fittings.
7. Condition the column, if needed. (See “Conditioning packed columns” on
page 26.)
Installing ferrules on a metal column
Before installing packed metal columns, a ferrule should be locked on the
column end so that it is flush with the end of the column. This prevents
problems caused by dead volume in the fitting.
Inlet or detector 1/4-in. Packed metal column 1/8-in. Packed metal column
Where to install Comments Where to install Comments
Purged-packed inlet 1/4-in. liner See “Installing a liner”
on page 137
1/8-in. liner See “Installing a liner”
on page 137
FID 1/4-in. adapter
(part no. 19231-
80530)
Remove or install
adapter, as desired.
1/8-in. adapter
(part no. 19231-
80520)
See “Installing an
adapter in a detector
fitting” on page 47
TCD 1/4-in. adapter
(part no. G1532-
20710)
See “Installing an
adapter in a detector
fitting” on page 47
Detector fitting Remove adapter, if
necessary.
Recommended
Minimum exposed column
Not Recommended
Too much column extends past the ferrule;
may cause problems due to dead volume.
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