Articles | Volume 13, issue 11
Atmos. Meas. Tech., 13, 5873–5890, 2020
https://doi.org/10.5194/amt-13-5873-2020
Atmos. Meas. Tech., 13, 5873–5890, 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 et al.

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Latest update: 06 Jul 2022
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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.