Articles | Volume 15, issue 18
https://doi.org/10.5194/amt-15-5455-2022
https://doi.org/10.5194/amt-15-5455-2022
Research article
 | 
26 Sep 2022
Research article |  | 26 Sep 2022

Comparison of two photolytic calibration methods for nitrous acid

Andrew J. Lindsay and Ezra C. Wood

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Latest update: 07 Oct 2024
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Short summary
Nitrous acid (HONO) is an important source of the main atmospheric oxidant – the hydroxyl radical (OH). Advances in nitrous acid measurement techniques and calibration methods therefore improve our understanding of atmospheric oxidation processes. In this paper, we present two calibration methods based on photo-dissociating water vapor. These calibration methods are useful alternatives to conventional calibrations that involve a reacting hydrogen chloride vapor with sodium nitrite.