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Inlets
Septa Troubleshooting
Symptom Possible Causes Remedy
Extra Peaks/Humps Septum bleed Turn off injector heater. If extra
peaks disappear, use septum
specified for higher temperature
or analyze at lower inlet
temperature.
Baseline Change After Large
Peak
Large leak at septum during
injection and for a short time
thereafter (common with large
diameter needles)
Replace septum and use smaller
diameter needles.
Retention Times Prolonged Carrier gas leaks at septum or
column connection
Check for leaks. Replace septum
or tighten connections if
necessary.
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