98
03-914648-00:7
5
Continue to hold the column as you tighten the capillary column nut
carefully and only enough to obtain a good seal and hold the
column firmly in place. Refer to Table 20 for tightening
recommendations for common ferrules.
Table 19 Detector Installation Depths
Detector Depth
(cm)
TCD
FID/TSD
PFPD
ECD
3.9
9.5
9.7
10.5
Figure 12 Column Ends
Table 20 General Tightening and Re-tightening for Common Ferrules
Ferrule Type
Recommendation
Comments
New
graphite ferrule
¼ - turn past finger-tight
¼ - to ½ -turn past finger-tight may
be required to achieve a seal.
Used
graphite ferrule
¼ - urn past finger-tight
If a different size of column is used,
more tightening may be required.
New
polyimide/graphite
ferrule
¼ - to ½ -turn past finger-tight
May require retightening after first
or second programmed run. Over
tightening will destroy ferrule and
seal.
Used
polyimide/graphite
ferrule
¼ - turn past finger-tight
Re-use only on same size column.
New
polyimide ferrule
Not recommended with 1061
Used
polyimide ferrule
Not recommended with 1061
1
Capillary column nut
2
Fused silica column
3
Capillary column ferrule
4
Properly cut column end
5
Improperly cut column ends
Column Ferrule Selection Table
Ferrule ID
Column ID
0.4 mm
250
µ
0.5 mm
320
µ
0.8 mm
530
µ
3
1
4 5
2
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