Patent ID: 6192766
Filing Date: 2001-02-27
Classification: F41H,G01N

Abstract:
Apparatus for the detection of an analyte in air comprising an air sampling system for collecting an air sample comprising a funnel or nozzle and a fan,means for transport of the air through a first enrichment stage for enrichment of the analyte comprising a thermally regulated adsorption/-desorption filter creating a non-laminar gas flow for adsorption of the analyte on the filter surfaces, encased in a housing having a gas inlet and a gas outlet connected to a revolver, and a heat source for heating the filter to a temperature high enough to evaporate the analyte but low enough to avoid decomposition of the analyte,means for transport of the desorbed analyte from the filter to a second enrichment stage for the further enrichment of the gaseous analyte comprising a cold trap for condensing the analyte, means for extraction of the condensed material with a solvent, and means for collecting the resulting solution of condensed material and solvent enriched in analyte from the cold trap, andmeans for transport of the collected liquid sample to an analytical detection system for the detection of the analyte.