An Evaluation of Integrating Techniques for Measuring Atmospheric Nitrogen Dioxide
| Autor: | Paul B. Shepson, L. A. Barrffi, Kurt G. Anlauf, Gervase I. Mackay, K. J. Hedley, D. C. Mactavish, J. W. Bottenheim |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Sorbent
Chemistry Silica gel Health Toxicology and Mutagenesis fungi Public Health Environmental and Occupational Health Analytical chemistry Diphenylamine Soil Science Pollution Analytical Chemistry Cartridge chemistry.chemical_compound Triethanolamine Reagent medicine Environmental Chemistry Nitrogen dioxide Waste Management and Disposal Water Science and Technology medicine.drug |
| Zdroj: | International Journal of Environmental Analytical Chemistry. 54:167-181 |
| ISSN: | 1029-0397 0306-7319 |
| DOI: | 10.1080/03067319408034087 |
| Popis: | Two integrating techniques for measuring ambient NO2 were evaluated. Both techniques involved quantitative collection of NO2 in a reagent coated cartridge, specifically triethanolamine (TEA)-coated silica gel and diphenyl-amine (DPA)-coated Florisil. The evaluation of these techniques consisted of laboratory and field studies. The laboratory studies of the TEA method indicated collection and reaction efficiencies of 100 and 90%, respectively. A positive interference occurred when O3 and NO were passed through the cartridge simultaneously. PAN was found to produce a 67% positive interference. The ambient concentrations determined using the TEA method were approximately a factor of two higher than those determined using TDLAS. For the DPA method the collection and reaction efficiencies were determined to be 100 and 64%, respectively. O3 produced a negative interference by reacting with the NO2-DPA products. PAN produced a 42% positive interference. A regression of the DPA versus TDLAS determined am... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|