Passive monitoring apparatus for detection of very low concentrations of organic contaminating in an atmosphere

摘要

The apparatus comprises a recipient1 having a first chambre2 of sampling can be exposed to the atmosphere to be monitored and a second chambre3, as well as an adsorbent charge5 retained by a metallic cloth fine6. In a position of the container, the adsorbent occupies the chambre2 and, during a change of position, the adsorbent is in the chamber 3 of desorption. A gas, introduced at 12, the vapors vehicule10 desorbed to a device for analysis. / p & & p & application: monitoring of an atmosphere of the work site or surrounding an industrial installation for detection concentrations of the order of 10 ppm of vapors and