Fig. 1: Differences in the molecular composition of the CHONS, CHOS, CHON, CHO, CHNS, and CHN from clean to haze period and day-night contrast in the combined ESI- and ESI+ modes.
From: Enhanced nocturnal and aqueous formation of CHON during winter haze in Beijing
Overlapping molecules between samples (clean and haze; CD, HD, CN, and HN) were marked with shadow. Pie charts demonstrate the category proportion of unique molecules.
