18 Maintenance and Inspection
18.3 Inspection and Maintenance: Septum
289
GC-2010 Plus
Q Conditioning the septum
For high sensitivity analysis, impurities from the septum may be detected as ghost peaks.
Condition the septum as described below.
(1) Soak the septum in hexane for 10 to 15 hours.
The septum will absorb hexane and swell into approximately twice its size. Therefore,
use a container with a wide opening and a lid.
(2) Take out the septum, and put it into a rinse container.
Pay strict attention when handling a septum swollen with hexane because it can easily crumble.
(3) Let the septum air dry in a clean area.
(4) After drying, bake the septum at 130 to 150 °C for approximately 2 hours.
NOTE Store the septum in a clean, sealed containes to prevent contamination.
Q Inspection
When inspecting only the septum, remove the septum nut above the septum, take out the
septum, then condition it or replace it with a new one.
Fig. 18.3.1
NOTE Septum nut for the SPL of the GC-2010 Plus has a “P” mark. Do not mix up the nut with the septum nut
for the WBI-2010 Plus or the injection port of the GC-2010.
Fig. 18.3.2
Q Septum installation
Install the conditioned septum or a new septum using the following procedure.
When using an autosampler, tighten the septum nut by hand until it touches the nut below
the screw, then loosen a half turn. When performing mamual injections, you can extend the
life of the septum and prevent the carrier gas leakage by tightening the septum nut by one
thread after approximately 10 injections. When the injection port is hot, the septum nut is
also hot. When tightening the septum nut, wear gloves to prevent burns.
Q Restarting the gas chromatograph main body
Using tweezers, replace the derector cover, then the INJ/DET cover.
When starting up the GC again, select [Anal.] (PF menu). The GC automatically flows the
carrier gas for 5 minutes, and then restores the temperatures set prior to maintenance.
When the STATUS indicator light turns green and the baseline becomes stable, you can start analysis.
Septum nut
Glass insert nut
Septum Nut for SPL Septum Nut for Others
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