A solvent-free, thermal extraction method for analysis of polycyclic aromatic hydrocarbons (PAHs) in gas phase airborne samples was developed. A fully automated thermal desorber (TD) coupled with highly selective and sensitive gas chromatography-tandem mass spectrometry (GC-MS/MS) was used to determine the concentration of trace level PAHs. Air sampling was conducted to tune the sampling and analytical conditions. Various instrument operating parameters such as sorbent tube desorption temperature/time, cold trap desorption temperature/time, outlet split ratio, tube storage stability, as well as air sampling flow rate and time were tested to optimize the analytical conditions. Method performance showed linearity in broad range (0.01 to 10 ng) with regression coefficients of external calibration curves (R