Table 1 Comparison of biomass burning tracers during the winter months in the region.

From: The Impact of Russia-Ukraine geopolitical conflict on the air quality and toxicological properties of ambient PM2.5 in Milan, Italy

Study

Year

Sample

Species

OC (μg/m3)

EC (μg/m3)

PAHs (ng/m3)

Levoglucosan (ng/m3)

Current study

2023

PM2.5

8.28 ± 0.16

5.50 ± 0.11

45.18 ± 3.27

1335.0 ± 28.25

Perrone et al.44

2006–09

PM2.5

6.04

25.8 ± 4.3

502 ± 134

Altuwayjiri et al.82

2020

PM2.5

2.41 ± 0.14

0.28 ± 0.03

1.42 ± 0.21

53.85 ± 8.06

Daher et al.43

2009–10

PM10

11.65

0.75

7.47

53

Pietrogrande et al.16

2020

PM10

10.38 ± 4.23

1.64 ± 0.9

3.71 ± 3.77

1100 ± 710

Pietrogrande et al.67

2020

PM10

11.10 ± 4.56

1.47 ± 0.83

2.82 ± 2.22

1070 ± 720