18 Maintenance and Inspection
18.6
18.
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GC-2010 Plus
18.6
Inspection and Maintenance: Graphite Ferrule
NOTE For the details on handling of the graphite ferrule, refer to “4 Installing the column”.
18.6.1 Inspection/maintenance cycle
A graphite ferrule is used at both ends of the capillary column.
In the following situations, inspect or replace the graphite ferrule.
・ When a new graphite ferrule is being installed.
・ When ghost peaks are detected during temperature increase.
・ When the baseline drifts significantly during temperature increase.
18.6.2 Inspection/maintenance
Q Troubleshooting
(1) Check for carrier gas leaks
Deteriocating ferrules can cause carrier gas leaks and poor reproducibility.
Check the gap between the back ring and the side ring of the graphite ferrule. If it is in
poor condition, replace it with a new graphite ferrule.
Fig. 18.6.1 Graphite ferrule
(2) Check for the source of contamination.
Ghost peaks can be caused by a poorly made column inlet connection.
Baseline drift can be caused by a poor connection at the column outlet (provided the
column has been sufficiently conditioned).
If a contaminated graphite ferrule is causing problems, condition the graphite ferrule
using the procedure described below.
WARNING
Risk of burns.
Do not perform maintenance until the temperature of the injection
port, detector, and oven have doopped below 50 °C.
CAUTION
Wait until the heated zones have cooled to loosen screws and nuts to
present them from binding.
Indicates deteriorationBack ring Side ring
New graphite ferrule Graphite ferrule in poor condition
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