Articles | Volume 13, issue 11
https://doi.org/10.5194/amt-13-5873-2020
https://doi.org/10.5194/amt-13-5873-2020
Research article
 | 
06 Nov 2020
Research article |  | 06 Nov 2020

A portable, robust, stable, and tunable calibration source for gas-phase nitrous acid (HONO)

Melodie Lao, Leigh R. Crilley, Leyla Salehpoor, Teles C. Furlani, Ilann Bourgeois, J. Andrew Neuman, Andrew W. Rollins, Patrick R. Veres, Rebecca A. Washenfelder, Caroline C. Womack, Cora J. Young, and Trevor C. VandenBoer

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AR by Trevor VandenBoer on behalf of the Authors (16 Aug 2020)  Author's response    Manuscript
ED: Publish as is (11 Sep 2020) by Dwayne Heard
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Short summary
Nitrous acid (HONO) is a key intermediate in the generation of oxidants and fate of nitrogen oxides in the atmosphere. High-purity calibration sources that produce stable atmospherically relevant levels under field conditions have not been made to date, reducing measurement accuracy. In this study a simple salt-coated tube humidified with water vapor is demonstrated to produce pure stable low levels of HONO, with modifications allowing the generation of higher amounts.