Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 13, issue 8
Articles | Volume 13, issue 8
https://doi.org/10.5194/amt-13-4159-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-13-4159-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 8
Research article
 | 
05 Aug 2020
Research article |  | 05 Aug 2020

A compact, high-purity source of HONO validated by Fourier transform infrared and thermal-dissociation cavity ring-down spectroscopy

Nicholas J. Gingerysty and Hans D. Osthoff

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Short summary
The generation of clean calibration gases is critical for accurate ambient air measurements. Here, we describe a source of HONO vapour dynamically generated from reaction of HCl and NaNO2. The output was characterized by Fourier transform infrared (FTIR) and thermal-dissociation cavity ring-down spectroscopy (TD-CRDS) and was stable, tuneable, and > 95 % pure. We show how generation of unwanted side products (NO, NO2, and ClNO) can be avoided.
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