Thermodesorption with Perkin-Elmer ATD

[emsman]

Hi!
I'm working in the analytical department of a thermoplastics manufacturer. Our newest equipment is a Perkin-Elmer ATD (Automated Thermo Desorber), which is coupled to a Agilent GC-MS. As this technique is quite new for me, I'm looking for someone who is experienced in thermodesorbtion and can give tips and answers to technical questions.

Thanks in advance and Greetings from Switzerland
Florian

[WK]

Emsman,
You won't get an answer until you ask a question!!

[emsman]

I now assume that you are dealing with thermodesorption. Of course there are some questions.

- have you experience in detecting with FID and MS similarily? i take a splitter at the end of the capillary from the ATD and then go through two columns to FID and MS, resp.
- the first results have been a bit chaotic and badly reproducable. How can i check if there aren't any contaminations from the system?
- as the helium flow is not regulated by EPC like in a normal GC it changes during the temperature programm. How can I optimize the flow and for which temperature during the oven programm?

thanks for answers
emsman