Pollution Characteristics of Atmospheric Carbonyl Compounds in a Large City of Northern China

Table 2

Concentration of carbonyl compounds in Jinan during the summers of 2018 and 2020 (ppbV).

Compound	2018; Mean ± SD	2020; Mean ± SD
Formaldehyde	3.94 ± 2.25	2.51 ± 1.17
Acetaldehyde	1.71 ± 0.72	1.28 ± 0.47
Acetone	2.60 ± 0.97	1.88 ± 0.71
Butyraldehyde	0.62 ± 0.26	0.24 ± 0.10
Crotonaldehyde	—	0.08 ± 0.03
Isovaleraldehyde	0.20 ± 0.13	0.02 ± 0.02
Propionaldehyde	0.47 ± 0.19	0.16 ± 0.06
o-Tolualdehyde	0.26 ± 0.16	0.006 ± 0.01
m-Tolualdehyde	0.12 ± 0.11	0.01 ± 0.01
p-Tolualdehyde	—	0.003 ± 0.01
Valeraldehyde	0.19 ± 0.09	0.02 ± 0.01
Hexaldehyde	0.11 ± 0.07	0.002 ± 0.01
Benzaldehyde	0.25 ± 0.18	0.01 ± 0.01
Acrolein	—	0.04 ± 0.01
Dimethylbenzaldehyde	0.04 ± 0.02	0.03 ± 0.04
Total	10.51 ± 0.13	6.30 ± 1.08

Note: “—” means the concentrations are below the detection limits. “SD” means standard deviation.