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5973 MSD Tune Abundances Off HELP

Discussions about GC-MS, LC-MS, LC-FTIR, and other "coupled" analytical techniques.

2 posts Page 1 of 1
I cleaned the 5973 source and now the 219 abundance is ~30% higher then 69, and 502 is much higher than usual (~80,000 vs ~14,000).

I tried resetting the autotune file thinking it could be corrupted, no luck.
I tried cleaning the source again, no luck.

Any ideas? The background sensitivity has increased significantly and I have a feeling this is the cause. There are no leaks in the system.
Update:

Purchased a used calibrant valve from ebay and now the machine tunes fine!
2 posts Page 1 of 1

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