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Table 4 Chemical composition of PM2.5 and PM2.5 + ozone aerosols

From: Effects of urban fine particulate matter and ozone on HDL functionality

Component

PM2.5

PM2.5 + ozone

p value

Ammonium (μg/m3)

4.7 ± 3.2

4.6 ± 4.8

0.919

Nitrate (μg/m3)

6.8 ± 6.2

5.7 ± 6.7

0.533

Sulphate (μg/m3)

11.1 ± 10.5

10.0 ± 10.9

0.693

Organic carbon (μg/m3)

28.0 ± 15.2

31.3 ± 16.5

0.425

Elemental carbon (μg/m3)

4.7 ± 3.1

4.5 ± 2.6

0.824

Total carbon (μg/m3)

32.7 ± 17.2

35.9 ± 17.4

0.488

Sulphur dioxide (μg/m3)

7.6 ± 13.6

1.9 ± 2.0*

0.03

Ozone (μg/m3)

18.9 ± 11.9

216.4 ± 11.9*

1.25 E-53

Nitric oxide (μg/m3)

23.9 ± 31.4

4.4 ± 3.5*

0.001

Nitrogen dioxide (μg/m3)

31.2 ± 19.7

48.2 ± 35.6*

0.026

Nitrogen oxide (μg/m3)

67.7 ± 53.1

54.7 ± 39.3

0.18

Total mass (μg/m3)

161.8 ± 59.7

157.7 ± 82.8

0.829

  1. Nitrogen oxide = Nitric oxide + Nitrogen dioxide. Values are mean ± S.D. *p<0.05