A Gerstel TDS 2 thermodesorption system was used. The desorption tube was
introduced into a thermodesorption unit then, the stir bar was thermally desorbed
by heating the TDS 2 from 20C (for 1 min) to 230C (for 4 min) at 60C/min. The
desorbed components were cryofocused in the CIS4 at 150C. Afterward, the CIS4
temperature was increased to 250C at 12C/s and held for 10 min. The trapped
components were injected onto a GC column. Injection was performed in the
splitless mode.
GC/