Articles | Volume 24, issue 18
https://doi.org/10.5194/acp-24-10531-2024
https://doi.org/10.5194/acp-24-10531-2024
Measurement report
 | 
23 Sep 2024
Measurement report |  | 23 Sep 2024

Measurement report: Occurrence of aminiums in PM2.5 during winter in China – aminium outbreak during polluted episodes and potential constraints

Yu Xu, Tang Liu, Yi-Jia Ma, Qi-Bin Sun, Hong-Wei Xiao, Hao Xiao, Hua-Yun Xiao, and Cong-Qiang Liu

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Cited articles

Berta, V. Z., Russell, L. M., Price, D. J., Chen, C.-L., Lee, A. K. Y., Quinn, P. K., Bates, T. S., Bell, T. G., and Behrenfeld, M. J.: Non-volatile marine and non-refractory continental sources of particle-phase amine during the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES), Atmos. Chem. Phys., 23, 2765–2787, https://doi.org/10.5194/acp-23-2765-2023, 2023. 
Chan, L. P. and Chan, C. K.: Role of the Aerosol Phase State in Ammonia/Amines Exchange Reactions, Environ. Sci. Technol., 47, 5755–5762, https://doi.org/10.1021/es4004685, 2013. 
Chang, Y., Wang, H., Gao, Y., Jing, S. a., Lu, Y., Lou, S., Kuang, Y., Cheng, K., Ling, Q., Zhu, L., Tan, W., and Huang, R.-J.: Nonagricultural Emissions Dominate Urban Atmospheric Amines as Revealed by Mobile Measurements, Geophys. Res. Lett., 49, e2021GL097640, https://doi.org/10.1029/2021GL097640, 2022. 
Chen, D., Yao, X., Chan, C. K., Tian, X., Chu, Y., Clegg, S. L., Shen, Y., Gao, Y., and Gao, H.: Competitive Uptake of Dimethylamine and Trimethylamine against Ammonia on Acidic Particles in Marine Atmospheres, Environ. Sci. Technol., 56, 5430–5439, https://doi.org/10.1021/acs.est.1c08713, 2022a. 
Chen, Y., Lin, Q., Li, G., and An, T.: A new method of simultaneous determination of atmospheric amines in gaseous and particulate phases by gas chromatography-mass spectrometry, J. Environ. Sci., 114, 401–411, https://doi.org/10.1016/j.jes.2021.09.027, 2022b. 
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Short summary
This study investigates the characteristics of aminiums and ammonium in PM2.5 on clean and polluted winter days in 11 Chinese cities, highlighting the possibility of the competitive uptake of ammonia versus amines on acidic aerosols or the displacement of aminiums by ammonia under high-ammonia conditions. The overall results deepen the understanding of the spatiotemporal differences in aminium characteristics and formation in China.
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