A calibrated source of N2O5 |
| |
| Institution: | 1. A.E. Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation;2. Molecular Tectonics Laboratory, University of Strasbourg, UMR UDS-CNRS 7140, Institut le Bel, 4, rue Blaise Pascal, F-67000 Strasbourg, France;3. Kazan Federal University, Kremlevskaya str.18, 420008 Kazan, Russian Federation |
| |
| Abstract: | A calibrated source of N2O5 was developed for use in evaluating instruments designed to measure reactive odd-nitrogen species in the atmosphere. The desirable features of the source are the output of a very low mixing ratio of N2O5, the measurement of total reactive nitrogen NOy in the source output, and the use of commercially-available detection and calibration equipment. N2O5 was derived from a solid crystalline sample at 192 K. Mixing ratios of N2O5 less than 2 ppmv (parts per million by volume) were produced in a small flow ( < 50 STPcc min−1) of He carrier gas. This small flow was then diluted to obtain mixing ratios less than 50 ppbv (parts per billion by volume) in flows greater than 1 STPℓ min−1. The N2O5 mixing ratio was determined with an accuracy of ± 15 % by using a thermal dissociator, calibrated NO/N2 mixtures, and an NO chemiluminescence detector. The level of other reactive nitrogen species in the source output was determined with an Au catalytic converter and the NO detector. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
