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