Articles | Volume 16, issue 22
https://doi.org/10.5194/amt-16-5525-2023
https://doi.org/10.5194/amt-16-5525-2023
Research article
 | 
18 Nov 2023
Research article |  | 18 Nov 2023

Colorimetric derivatization of ambient ammonia (NH3) for detection by long-path absorption photometry

Shasha Tian, Kexin Zu, Huabin Dong, Limin Zeng, Keding Lu, and Qi Chen

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Cited articles

Beniwal, A. and Sunny: Electrospun SnO2/PPy nanocomposite for ultra-low ammonia concentration detection at room temperature, Sensor. Actuat. B, 296, 126660, https://doi.org/10.1016/j.snb.2019.126660, 2019. 
Bae, M. S., Demerjian, K. L., Schwab, J. J., Weimer, S., Hou, J., Zhou, X., Rhoads, K., and Orsini, D.: Intercomparison of Real Time Ammonium Measurements at Urban and Rural Locations in New York, Aerosol Sci. Technol., 41, 329–341, https://doi.org/10.1080/02786820701199710, 2007. 
Behera, S. N., Sharma, M., Aneja, V. P., and Balasubramanian, R.: Ammonia in the atmosphere: a review on emission sources, atmospheric chemistry and deposition on terrestrial bodies, Environ. Sci. Pollut. Res. Int., 20, 8092–8131, https://doi.org/10.1007/s11356-013-2051-9, 2013. 
Benson, D. R., Markovich, A., Al-Refai, M., and Lee, S.-H.: A Chemical Ionization Mass Spectrometer for ambient measurements of Ammonia, Atmos. Meas. Tech., 3, 1075–1087, https://doi.org/10.5194/amt-3-1075-2010, 2010. 
Berden, G., Peeters, R., Meijer, G., and Apituley, A.: Open-path trace gas detection of ammonia based on cavity-enhanced absorption spectroscopy, Applied Physics B, 71, 231–216, https://doi.org/10.1007/s003400000302, 2000. 
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Short summary
We developed an online NH3 monitoring system based on a selective colorimetric reaction and a long-path absorption photometer (SAC-LOPAP), which can run statically for a long time and be applied to the continuous online measurement of low concentrations of ambient air by optimizing the reaction conditions, adding a constant-temperature module and liquid flow controller. It is well suited for the investigation of the NH3 budget for urban to rural conditions in China.
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