Optimization and Validation of Thermal Desorption Gas Chromatography-Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Ambient Air

Table 3

Optimized conditions for thermal desorption system.

Primary desorption		Secondary desorption
Parameter		Parameter
Tube temperature	320°C	High trap temperature	320°C
Time	10 min	Low trap temperature	−10°C
Desorption flow	150 mL·min^−1	Time	6 min
Inlet split flow	23 mL·min^−1	Outlet split flow	10 mL·min^−1