Field evaluation of a glass honeycomb denuder/filter pack system to collect atmospheric gases and particles
- Harvard Univ., Boston, MA (United States). School of Public Health
- Environmental Protection Agency, Research Triangle Park, NC (United States)
The authors have developed a glass honeycomb denuder/filter pack system to sample atmospheric inorganic gases and particles. The main feature of the sampler is the denuder component, which has a large number of small hexagonal glass tubes sealed inside an outer glass tube. Outdoor concentrations of nitric acid (HNO{sub 3}), nitrous acid (HONO), ammonia (NH{sub 3}), sulfur dioxide (SO{sub 2}), and fine-particle sulfate (SO{sub 4}{sup 2{minus}}) and ammonium (NH{sub 4}{sup +}) determined with the honeycomb denuder sampler were compared to those determined with a collocated Harvard/EPA Annular Denuder System (HEADS). The average collection of the HEADS sampler was higher than that of the honeycomb sampler for NH{sub 3} and HNO{sub 3}, whereas concentrations of SO{sub 2}, HONO, and particulate NH{sub 4}{sup +} and SO{sub 4}{sup 2{minus}} determined by both samplers were in excellent agreement.
- OSTI ID:
- 197392
- Report Number(s):
- CONF-9405167-; TRN: IM9612%%166
- Resource Relation:
- Conference: Measurement of toxic and related air pollutants, Durham, NC (United States), 3-6 May 1994; Other Information: PBD: 1994; Related Information: Is Part Of Measurement of toxic and related air pollutants. Proceedings of the 1994 U.S. EPA/A and WMA international symposium; PB: 1075 p.
- Country of Publication:
- United States
- Language:
- English
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