Articles | Volume 11, issue 5
https://doi.org/10.5194/amt-11-2821-2018
https://doi.org/10.5194/amt-11-2821-2018
Research article
 | 
14 May 2018
Research article |  | 14 May 2018

Folded tubular photometer for atmospheric measurements of NO2 and NO

John W. Birks, Peter C. Andersen, Craig J. Williford, Andrew A. Turnipseed, Stanley E. Strunk, Christine A. Ennis, and Erick Mattson

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AR by Andrew Turnipseed on behalf of the Authors (17 Apr 2018)  Author's response    Manuscript
ED: Publish subject to technical corrections (20 Apr 2018) by Lisa Whalley
AR by Andrew Turnipseed on behalf of the Authors (23 Apr 2018)  Author's response    Manuscript
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Short summary
A modular long-path folded tubular photometer for making absorbance measurements of air pollutant concentrations is described. The present paper applies this photometer to direct measurements of nitrogen dioxide and, indirectly, to nitric oxide. Excellent agreement for both was observed for measurements along an urban roadside compared with existing standard techniques. Advantages and extension of this technique to other atmospheric pollutants, including particulates, are discussed.