Columns and Traps Part 2. Packed metal columns
Ferrules for packed metal columns
130
Ferrules for packed metal columns
Table 15 lists some of the nuts and ferrules used with packed metal columns.
Consult the Agilent catalog for consumables and supplies for a more complete
listing.
Ferrules that are prepared improperly cause leaks and contamination. Here are
some hints to avoid problems.
Graphite and graphitized-Vespel ferrules. Place these ferrules in a petri dish
and bake in the GC oven at 250 to 300°C for 30 minutes before use to remove
organic compounds absorbed by the graphite. Leave a petri dish of assorted
ferrules in the GC oven to ensure a clean supply.
Vespel ferrules
. These ferrules can be more leaktight than graphite, but have
a lower temperature limit. They should be retightened after a few oven
temperature cycles to ensure a good seal. Be sure to use the correct ferrule for
the size column you are using.
Table 15 Nuts and Ferrules Used with Packed Metal Columns
Item* Typical use Part no.
1/4-inch swage stainless steel, pkg of 20
(nut, front ferrule, back ferrule)
1/4-inch 5080-8753
1/8-inch swage stainless steel, pkg of 20
(nut, front ferrule, back ferrule)
1/8-inch 5080-8751
1/4-inch swage brass, pkg of 20 each
(nut, front ferrule, back ferrule)
1/4-inch 5080-8752
1/8-inch swage brass, pkg of 20 each
(nut, front ferrule, back ferrule)
1/8-inch 5080-8750
1/4-inch graphitized Vespel ferrule,
pkg of 10
inlet/detector liner/adapters
1/4-inch columns
5080-8774
1/8-inch graphitized Vespel ferrule,
pkg of 10
1/8-inch columns 0100-1107
* O-ring and ferrule ids
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