Summary
The properties of PAN in the gas phase are reviewed. The convertibility to NO of organic nitrogen Compounds on a hot carbon-molybdenum catalyst forms the basis for a sensitive and specific GC detector which detects PAN at the 50 pg level. When a correction is applied for heterogeneous decay on the GC column, the detector measures absolute PAN concentrations when calibrated with NO. The detector was used in a smog Chamber study to determine the fractional conversion of NO2 to PAN in irradiations with individual hydrocarbons. It is concluded that a few reactive Compounds are mainly responsible for high PAN concentrations in photochemical smog. By combination with a cryo-trapping technique the detection limit of the GC-NO detector could be extended to 20 ppt (0.5 pg). The effect of liquid water on PAN in the cryotrap was rationalized by measurements of the deposition velocity on liquid water surfaces, which is in the order of 0.006 cm/s below pH 7.
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© 1984 ECSE, EEC, EAEC, Brussels and Luxembourg
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Schurath, U., Kortmann, U., Glavas, S. (1984). Properties, Formation and Detection of Peroxyacetyl Nitrate. In: Versino, B., Angeletti, G. (eds) Physico-Chemical Behaviour of Atmospheric Pollutants. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-6505-8_4
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DOI: https://doi.org/10.1007/978-94-009-6505-8_4
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