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Inlets
Splitless Inlet Troubleshooting
Most problems encountered with a splitless injection are related to:
• Incorrect purge time
• Degradation
• Improper focusing
• Inappropriate column temperature
• Flashback
You can also improve the reproducibility and linearity of peak areas and avoid backflash
by matching:
• Inlet temperature
• Liner volume
• Injection volume
Decomposition
Loss of peak area or generation of new peaks, can sometimes be dramatically reduced by
changing liner type or by deactivating the liner and inlet with silanizing reagents.
Removing or reducing the amount of liner packing can also decrease inlet activity.
Column Troubleshooting
Normal Peaks Tailing Solvent Peaks Wrong Peak Ratios
Correct column positioning in
both injection port and FID
Column positioned incorrectly
in the injection port of
possible ferrule particle in
the carrier gas flow path
Column positioned in the inlet
(either too far or not far
enough; verify 4-6 mm
installation distance)
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