Article

Journal of Atmospheric Chemistry

, Volume 15, Issue 1, pp 79-95

First online:

Alkyl nitrates and bifunctional nitrates of atmospheric interest: Henry's law constants and their temperature dependencies

  • Jost KamesAffiliated withInstitut für Physikalische und Theoretische, Chemie der Universität Bonn
  • , Ulrich SchurathAffiliated withInstitut für Physikalische und Theoretische, Chemie der Universität Bonn

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Abstract

Henry's law coefficients of 15 alkyl nitrates, keto-, hydroxy-, and dinitrates of atmospheric interest have been measured, mostly over the temperature range 1–25°C. The compounds are stable in aqueous solution. Where literature data were available, Henry's law coefficients are in very good agreement. It is concluded that dissolution in cloud and rain water is not an important loss process for alkyl mononitrates in the atmosphere. The residence times of the more soluble bifunctional organic nitrates, however, are significantly affected or even controlled by washout and rainout. Gas chromatographic analysis of bifunctional nitrates in preconcentrated atmospheric samples may be adversely affected by the adsorptive properties of these compounds.

Key words

Organic nitrates hydroxy nitrates dinitrates nitrooxy acetone Henry's law constants hydrolysis rates