GC-MS Baseline Increase

MONKA 7 months ago

I am using GC-MS and Ultra Inert Liners, 5190-2295 for Pyrethroid pesticides.

Problem: The baseline has a normal section and an increased section during the sample analysis process. The increased section obscures Cypermethrin peak and Cyfluthrin peak (I care a lot about these two substances)

This increase or decrease does not depend on the oven program.

Please give me some advice to improve the problem

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0 garyb007 7 months ago

The ions you are scanning for changes so if the baseline has more or less of those ions due to background or sample matrix it will jump up and down over the time ranges.
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0 garyb007 7 months ago

The ions you are scanning for changes so if the baseline has more or less of those ions due to background or sample matrix it will jump up and down over the time ranges.
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0 MONKA 7 months ago in reply to garyb007

This is standard. Used to be fine, I had a problem about a month ago
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