Technical Note: A technique to convert NO<sub>2</sub> to NO<sub>2</sub><sup>−</sup> with S (IV) and its application to measuring nitrate photolysis

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Abstract 2) and nitric oxide (NO) – and nitrous acid (HONO). Nitrate photolysis in the environment occurs through two channels which produce (1) NO2 and hydroxyl radical (⚫ 2 - 3 P)). Although the aqueous quantum yields and photolysis rate constants of both channels have been established, field observations suggest that nitrate photolysis is enhanced in the environment. Laboratory studies investigating these enhancements typically only measure one of the two photo-channels, since measuring both channels generally requires separate analytical methods and instrumentation. However, measuring only one channel makes it difficult to assess whether secondary chemistry is enhancing one channel at the expense of the other or if there is an overall enhancement of nitrate photochemistry. Here, we show that the addition of S (IV), i.e., bisulfite and sulfite, can convert NO2 to NO2 - 2 and accurately quantify the resulting NO2 - ⚫ 2 - 2 but does not enhance the overall photolysis efficiency of nitrate.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Technical Note: A technique to convert NO2 to NO2− with S (IV) and its application to measuring nitrate photolysis ; volume:24 ; number:7 ; year:2024 ; pages:4411-4419 ; extent:9
Atmospheric chemistry and physics ; 24, Heft 7 (2024), 4411-4419 (gesamt 9)

Urheber
Lieberman, Aaron
Picco, Julietta
Onder, Murat
Anastasio, Cort

DOI
10.5194/acp-24-4411-2024
URN
urn:nbn:de:101:1-2404180414574.726231183586
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 11:01 MESZ

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Beteiligte

  • Lieberman, Aaron
  • Picco, Julietta
  • Onder, Murat
  • Anastasio, Cort

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