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- Posts: 1
- Joined: Fri Feb 24, 2023 4:39 pm
- Location: United States
Can someone tell me the cause of the steep baseline drop off at the 2 minute mark, and potential reasons why the baseline is slowly decreasing through the entire run.
It seems the drop coincides with my oven program (see below), but why would it drop so suddenly? Additionally I am picking up peaks at m/z 28 and 32, is the problem potentially an air leak? These peaks loose abundance as the run progresses, what would be the cause of that.
If anyone could recommend solution I would be greatly appreciative.
Program: Inlet (splitless) 250C purge flow 50mL/min @ 30 sec, gas saver 2 mL/min @ 1 min. Column: HP-5MS 30m x .25 mm, constant flow at 1.1 mL/min
Oven: Initial 60C hold 2 min, 15C/min to 300C