Patent ID: 6802227
Filing Date: 2004-10-12
Classification: F41H,G01N

Abstract:
An apparatus for capturing chemical substances in a carrier gas comprising:a tube including an inner surface, first and second open ends, and a channel therebetween, the channel bound by the inner surface of the tube, sorbent material affixed to the inner surface of the tube, temperature regulation means selected from the group consisting of thermal insulation at least partially enclosing the tube and cooling means in operative association with the tube which, when activated, causes the sorbent material to attain a temperature lower than that of ambient air outside of the tube, gas moving means for moving the carrier gas through the channel, and a partially enclosed structure including: an interior region, support holding the tube so that when the gas moving means is actuated, gases move from the interior region of the partially enclosed structure, through the channel of the tube and away from the partially enclosed structure, and an opening in the partially enclosed structure adapted to communicate with a soil region having a surface so that gases emanating from the surface of the soil region can pass into the interior region of the partially enclosed structure.