Replaceing GC Inlet Liner & O-Ring | Agilent 7890 Split/Splitless Inlet
How to replace the inlet liner and O-ring in an Agilent 7890 split/splitless GC inlet.
In this hands-on maintenance video, I show the complete process of accessing the inlet, removing the existing liner, installing a clean liner with the correct O-ring, and reassembling the inlet.
Topics covered:
• Removing the autosampler injector tower
• Cooling and depressurizing the inlet
• Removing the top insert assembly
• Removing the old inlet liner
• Installing the liner O-ring
• Installing the clean replacement liner
• Inspecting and cleaning the inlet components
• Reassembling the split/splitless inlet
• Restoring inlet pressure and checking operation
The inlet liner is one of the most frequently serviced components in a GC. Contamination, active sites, septum particles, and matrix buildup in the liner can affect peak shape, response, reproducibility, and carryover.
Routine inlet maintenance is especially important for trace-level GC and GC/MS analysis.
Vineta Mills Consulting
Practical GC and GC/MS maintenance, troubleshooting, chromatography, method development, and laboratory training.
Easy to follow