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. 2021 Jul 31;289:117887. doi: 10.1016/j.envpol.2021.117887

Fig. 2.

Fig. 2

(a) Box plots of the hourly relative peak area (RPA) of DEA under different RH conditions during the pre-LCD, LCD, and post-LCD; Temporal variations of RH, aerosol liquid water content (ALWC), number of amine-containing particles and the number fraction of amine/total detected particles during the (b) pre-LCD, (c) LCD and, (d) post-LCD.