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- Posts: 4
- Joined: Tue Sep 25, 2018 3:57 am
I have some problems need to help.
Currently, i am using organochlorine pesticides 17 compounds standard and DB 5MS column. When i use Scan mode have peaks of all compound, but with SIM mode at level of concentrations ( 2, 5, 10, 50, 100ppb) peak of compounds: heptachlor, endrin and p,p DDT no see.
I have cleaned ion source, replaced liner, replaced septa. I also cut column but not result.
Please support me. Thank all of you.