Sampling on adsorbent materials, packed in an appropriate tube, represents a handier sampling method than canisters and bags because it allows one to sample a great volume of air reducing the analytes in a small cartridge. The critical point is the choice of adsorbents (usually porous polymers or activated carbon, graphitized carbon black and carbon molecular sieves) [51,61-63], that depends on the chemical features of the compounds to be sampled [52]. A combination of different adsorbents is preferred to sample a wide class of compounds without breakthrough problems [62]. The sampling on adsorbent materials can be applied in active or passive mode. In active sampling, a defined volume of sample air is pumped at a controlled flow-rate. Passive or diffusive sampling occurs by direct exposure to the atmosphere; the process is governed by the adsorption properties of sorbent and diffusion processes [64-66]. The passive method does not require bulky and expensive pumps , that must be regularly checked, hindering field sampling, and it costs less than the active one. Moreover,particular care, on the choice of sampling volume, has to be taken to avoid breakthroughproblems [51,52]. However, the active modality allows a greater and more accurate sampling volume.For both procedures the compounds can be recovered through thermal desorption or liquid extraction