Patent Number: 6,192,766

Title: Apparatus, system and method for the detection of an analyte in air

Abstract: An apparatus, a system and a method for the detection of an analyte in air comprising an air sampling system (1) comprising a mouthpiece (10) and a fan, a first enrichment stage (11) for enrichment of the analyte comprising a thermally regulated adsorption/desorption filter (20) creating a non-laminar gas flow for adsorption of the analyte, a heat source for heating the filter to evaporate the analyte, a second enrichment stage (30) for the further enrichment of the gaseous analyte comprising a cold trap (32) for condensing the analyte, extraction of the condensed material with a solvent, and collecting the solution, and analyzing the collected liquid sample with an analytical detection system, are disclosed. Further, an adsoption/desorption filter creating a non-laminar gas flow comprising a winding (21) of a resistance wire coated with an active material electric heating of the wire, is described. A specific application is detection of a gaseous component of explosives or mines, e.g. TNT, in air.

Inventors: G.ang.rdhagen; Peter (Nora, SE), Samuelsson; Magnus (Eskilstuna, SE), Alm; Arne (Eskiltuna, SE), Jansson; (Eskilstuna, SE), Arnell; Johan (Eskilstuna, SE), Andersson; Claes (Karlskoga, SE), Johansson; Erik (Karlskoga, SE)


International Classification: G01N 1/34 (20060101); G01N 1/24 (20060101); G01N 1/22 (20060101); G01N 001/00 ()

Expiration Date: 02/27/2013