Hello! I'm having this issue for all my samples. There are at least 5 siloxanes abundant sharp peaks always showing up in my samples when using SPME extraction, both PDMS and DVB/CAR/PDMS fiber coating. I believe the contaminants derive from the vial cap septas.
Is there a way I can fix this problem? The pre-ensamble septa caps code is the following: 5188-2759
Do these caps need to be baked out prior use in samples? If this is case, what are the conditions for baking out? Can I use the GC oven hence we do not have available a Lab Oven?