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- Posts: 6
- Joined: Tue Jan 16, 2018 4:19 pm
i use Agilent 7890B GC-FID to analyze glycol in water. column is SPB-1000, 30X0.25mmx0.25um. injection value is 1ul, spitless(directly inject sample without extraction).
The temperature program is 50, 20c/min till 250.
the compounds are EG(BP=197),PG(BP=188),DEG(BP=245),TEG(BP=285).
My question is with this temperature program, TEG can not elute. But some lab staffs said TEG will elute. when i searched online, the final temp of some method is 200, and TEG will elute at 25 minutes. i am so confused.
Can someone explain this to me
thank you