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- Posts: 3
- Joined: Thu Feb 08, 2018 2:44 pm
I am currently working on my bachelor degree project that is about optimizing and evaluating Automated Thermal Desorption coupled online to GC/MS for determination of chemicals in textiles. The instrument is a PerkinElmer Turbomatrix 350 ATD- GC/MS.
The idea is that a small piece of textile can be cut out and directly inserted into the stainless steel tubes- plugged with a metal spring. This is then thermally desorbed in the ATD - using two stage desorption with a cryotrap that goes down to -40 degrees and then rapidly up to 300 deg.
The compounds I am currently interested in are quinoline and its derivatives.
My problem is that the peaks in the mass chromatogram from the quinolines are very low and accordning to previous analysis of the same textile, the intensity of these peaks should be much higher.
Has anyone worked with ATD for thermally desorbing volatiles from solid materials? Do you think the problem is that the analytes are not desorbed from the matrix or that these are trapped in the coldtrap?
My current parameters are set on:
Desorption temp: 150 degrees
Desportion time: 5-20min
Desorption volume: 60 ml/min
Trap temp: -10 - 300 degrees
Outlet split : 1-2 ml/min
Thankful for all the help!