Field evaluation of a glass honeycomb denuder/filter pack system to collect atmospheric gases and particles

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:197392

Sioutas, C; Koutrakis, P; Wolfson, J M; Azaroff, L S ^[1]; Mulik, J D ^[2]

---

1. Harvard Univ., Boston, MA (United States). School of Public Health
2. 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--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
AIR SAMPLERS
AMMONIA
AMMONIUM COMPOUNDS
DESIGN
EXPERIMENTAL DATA
FIELD TESTS
NITRIC ACID
NITROUS ACID
PERFORMANCE TESTING
SULFATES
SULFUR DIOXIDE