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- Posts: 35
- Joined: Wed Dec 21, 2016 12:38 am
I had posted this in the GC section since I suspected an inlet issue. But after connecting the 5977 to a better, less used 7890 GC and seeing the same problems, I doubt it.
We are losing the following compounds from the 16 EPA list: ACE, ANT, PYR, BAA,BAP. It's odd that PHE is strong, but ANT is greatly reduced.
I don’t see why certain PAHs would drop out entirely while others would not.
The source has been cleaned. Changed the column, liner, septa, syringe, gold seal, cleaned the inlet, tried a different GC
Tune seems ok, not great.
Anyone had issues like this before?