Journal
ATMOSPHERIC MEASUREMENT TECHNIQUES
Volume 9, Issue 6, Pages 2483-2495Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/amt-9-2483-2016
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Funding
- Engineering and Physical Sciences Research Council (ESPRC)
- NCAS, the National Centre for Atmospheric Science
- NERC, the Natural Environmental Research Council
- Natural Environment Research Council [NE/K012169/1, NE/M013545/1, ncas10007] Funding Source: researchfish
- NERC [NE/M013545/1, ncas10007, NE/K012169/1] Funding Source: UKRI
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Nitrous acid (HONO) has been quantitatively measured in situ by differential photolysis at 385 and 395 nm, and subsequent detection as nitric oxide (NO) by the chemiluminescence reaction with ozone (O-3). The technique has been evaluated by Fourier transform infrared (FT-IR) spectroscopy to provide a direct HONO measurement in a simulation chamber and compared side by side with a long absorption path optical photometer (LOPAP) in the field. The NO-O-3 chemiluminescence technique is robust, well characterized, and capable of sampling at low pressure, whilst solid-state converter technology allows for unattended in situ HONO measurements in combination with fast time resolution and response.
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