A high-efficiency annular diffusion scrubber for the collection of water-soluble trace atmospheric gases.
The design and construction details of an annular diffusion scrubber to be used as a quantitative gas sampler are described. A large-diameter inner tube (12 mm o.d.) wrapped with liquid channel interior of thin membrane (70 micro m thickness) provided high collection efficiency. With SO2 as the test gas, the performance data for a high-efficiency annular diffusion scrubber, coupled to an ion chromatograph, are presented. Quantitative collection and excellent reproducibility are observed at air sampling rates up to 2 L/min. The estimated detection limit is 4 pptv for a 20-L air sampling volume.
Chang
In-Hyoung
IH
Department of Chemistry, Yonsei University, Seoul, South Korea. inhyoungchang@yahoo.com
Chun
Sung-Bong
SB
Lee
Dong Soo
DS
D000393:Air Pollutants / Q000032:analysis*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D012995:Solubility; D013458:Sulfur Dioxide / Q000032:analysis*; D014867:Water / Q000737:chemistry
D000393:Air Pollutants; D014867:Water; D013458:Sulfur Dioxide