DISPOSITIVO PER IL CAMPIONAMENTO DIFFUSIONALE DI VAPORI ORGANICI NELLO AMBIENTE

A diffusive sampling device (1) for monitoring organic vapours in ambient air, of the type with desorption of the sampled species by solvent extraction, comprising a container (2) made of a chemically inert, substantially gas- and liquid-impervious material, having a closed bottom end and an open end opposed thereto and containing, at its bottom end, a layer of solid porous material (4) capable of uptaking the chemical substances to be sampled by physical or chemical adsorption, and a gas- and liquid-tight closure element (3) which may be coupled to the open end of the container (2), having an exposed portion closed by a pierceable membrane (10) suitable to allow the introduction of a hollow needle for the injection of a solvent and the withdrawal of the resulting solution. The device is particularly suitable for sampling organic vapours both in indoor and in outdoor environments, in urban, rural or industrial areas, and may be employed for the medium- and long-term evaluation of the atmospheric concentrations of pollutants.