Table 1.

Analytical conditions for VOC with thermodesorption GC/MSD.

Thermal desorber UNITY/ULTRA (Markes, UK)		GC/MSD (HP6890/5973, Hewlett Packard, USA)
Oven temp.	300°C	GC column	Rtx-1 (0.32 mm, 105 m, 1.5 μm)
Desorb time	10 min	Initial temp.	50°C (10 min)
Desorb flow	50 mL/min	Oven ramp rate	5°C/min
Cold trap holding time	5 min	Final temp.	250°C (5 min)
Cold trap high temp.	320°C	Post run	250°C (5 min)
Cold trap low temp.	−10°C	Column flow	1.13 mL/min
Cold trap packing	Tenax TA/carbopack B	Detector type	Quadropole
Min. pressure	12 psi	Q-pole temp.	150°C
Inlet split	No	MS Source temp.	230°C
Outlet split	10 mL/min	Mass range	35~300 amu
Valve and line temp.	180°C	Electron energy	70 eV