Field comparison of methods for the measurement of gaseous and particulate contributors to acidic dry deposition
A field study was conducted to compare methods for sampling and analysis of atmospheric constituents that are important contributors to acidic dry deposition. Three multicomponent samplers were used: the Canadian filter pack (FP), the annular denuder system (ADS), and the transition flow reactor (TFR). A tunable diode laser absorption spectrometer (TDLAS) provided continuous reference measurements of NO2 and HNO3. Nitrogen dioxide was also monitored with continuous luminol-based chemiluminescence monitors and with passive sampling devices (PSDs). The study was designed to provide a database for statistical comparison of the various methods with emphasis on the multicomponent samplers under consideration for use in a national dry deposition network. The study was conducted at the EPA dry deposition station in Research Triangle Park, NC between 29 September and 12 October, 1986. Daily averaging and/or sampling times were employed for the 13-day study; weekly samples were also collected, but results from these samples are not compared in the paper. Different measurements of ambient concentrations of the following constituents are compared: total particulate and gaseous NO3(-), HNO3, NO2, total particulate NH4(-), NH3, total particulate SO4(-), and SO2.
- Research Organization:
- Research Triangle Inst., Durham, NC (USA)
- OSTI ID:
- 5772119
- Report Number(s):
- PB-91-163774/XAB; CNN: EPA-68-02-4544
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ACIDIFICATION
AIR POLLUTION
AIR POLLUTION MONITORING
AIR SAMPLERS
AMMONIA
AMMONIUM COMPOUNDS
CANADA
CHALCOGENIDES
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
DEPOSITION
DEVELOPED COUNTRIES
EQUIPMENT
FIELD TESTS
HYDRIDES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN HYDRIDES
NITROGEN OXIDES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SAMPLERS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TESTING