title: Condenser-type diffusion denuders for the collection of sulfur dioxide in a cleanroom.
abstract: High-efficiency condenser-type diffusion denuders of cylindrical and planar geometries are described. The film condensation of water vapor onto a cooled denuder surface can be used as a method for collecting water-soluble gases. By using SO(2) as the test gas, the planar design offers quantitative collection efficiency at air sampling rates up to 5 L min(-1). Coupled to ion chromatography, the limit of detection (LOD) for SO(2) is 0.014 ppbv with a 30-min successive analysis sequence. The method has been successfully applied to the analysis of temperature- and humidity-controlled cleanroom air.
authors.affiliation: Department of Chemistry, Yonsei University, 120-749 Seoul, South Korea. ihchang@uiuc.edu
authors.forename: In-Hyoung
authors.initials: IH
authors.lastname: Chang
authors.forename: Dong Soo
authors.initials: DS
authors.lastname: Lee
authors.forename: Soon-Ho
authors.initials: SH
authors.lastname: Ock
mesh_terms: D000393:Air Pollutants / Q000032:analysis / Q000302:isolation & purification; D000397:Air Pollution / Q000517:prevention & control; D001331:Automation; D002845:Chromatography / Q000295:instrumentation / Q000592:standards; D004780:Environment, Controlled; D004867:Equipment Design; D016273:Occupational Exposure / Q000517:prevention & control / Q000592:standards; D012680:Sensitivity and Specificity; D013458:Sulfur Dioxide / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D000393:Air Pollutants; D013458:Sulfur Dioxide