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THERMAL DESORPTION GASCHROMATOGRAPHY/MASS SPECTROSCOPY

 

Markes Unity  thermal desorption unit in combination with a Interscience DSQ quadrupole mass spectrometer

Thermal desorption is a sample introduction technique for the identification and quantitative determination of volatile compounds.
Volatile compounds are collected on a suitable solid adsorbent (e.g. tenax, multilayer adsorbent) using a personal sample pumps.
The adsorbent tube is introduced in a thermal desorption unit.  The collected volatiles are thermally desorbed in an inert (He) atmosphere and volatiles are transferred to a cooled cryo-trap for focusing before transfer to a GC/MS apparatus.

Typical applications

  • Analysis of off-gassing or off-odour problems
  • Analysis of VOC and fogging in plastics (VDA278)
  • Analysis of rest solvents and rest monomers in printing inks and glues
  • Analysis of released volatiles during thermoforming processes.