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- Posts: 27
- Joined: Tue Apr 16, 2013 9:51 am
We have to measure BTEX, THM, trichloroethylene etc. and 2-butoxyethanol from air. We have a Markes TD-100 7890-7000C GC-MS system. We tried out Tenax and Carbograph/Carboxen/Tenax trap with Tenax and graphitised carbon cold traps. The TD method was: 6 min desorb time (300 °C), the cold trap: -20°C then 320 °C with 3 min hold time. The used column was PONA. The TD is directly connected to the column.
We have only problem 2-butoxyethanol it gives a broading peak about 0,5-0,7 min wide peak. The other compounds gives really nice peaks, we tried out even free phenols and with a little tailing but they give really nice peaks. We tried to leave out TD from the system and directly inject to the column with an SL inhlet and it was really good without TD.
Thank u for any helps!
Erdno