Articles | Volume 13, issue 1
https://doi.org/10.5194/amt-13-273-2020
https://doi.org/10.5194/amt-13-273-2020
Research article
 | 
23 Jan 2020
Research article |  | 23 Jan 2020

Quantification of nitrous acid (HONO) and nitrogen dioxide (NO2) in ambient air by broadband cavity-enhanced absorption spectroscopy (IBBCEAS) between 361 and 388 nm

Nick Jordan and Hans D. Osthoff

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Cited articles

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Short summary
We describe a new spectrometer for quantification of HONO and NO2 in ambient air, called HODOR. The instrument uses an LED and two highly reflective mirrors to increase the effective optical absorption path to ~6 km. The accuracy of concentration retrievals was validated using parallel measurements by a single wavelength cavity ring-down spectrometer of laboratory-generated gas mixtures. The instrument's precision suffices for quantification of HONO and NO2 in an urban environment.