Patent ID: 6890372
Filing Date: 2005-05-10
Classification: B01D,G01N

Abstract:
1. A denuder for collection and removal of a gaseous analyte from a sample gas, said denuder comprising: a housing including an internal cavity; a sample gas inlet fluidly coupled with a sample gas source; a denuder liquid inlet fluidly coupled with a denuder liquid source; and a barrier sheet extending across said internal cavity and separating said internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of said sample gas inlet, said barrier sheet having a liquid-reservoir surface and a gas-channel surface and being permeable to the liquid and to solution space species derived from the analyte gas of interest; and a denuder liquid disposed in said liquid reservoir and permeating said barrier sheet to coat said gas-channel surface of said barrier sheet thereby allowing said denuder liquid on said gas-channel surface to contact the sample gas flowing within said gas flow-through channel and allowing the collected analyte to travel through said barrier sheet into said liquid reservoir.