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SPME Contamination Issues

Question asked by hectorhenriquez on Jun 18, 2020
Latest reply on Jun 20, 2020 by yamame

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?

 

 

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