Table 1 Concentrations of EC emission parameters by flavors and puffing time

Nicotine, μg/m³

0.6

0.5

0.55 ± 0.07

1.5

3.3

2.40 ± 1.27

1.1

2.7

1.90 ± 1.13

1.1

7.6

4.35 ± 4.60

PM_2.5, μg/m³

2.7

1.8

2.25 ± 0.64

24.0

343.8

183.90 ± 226.13

3.7

N.A.

–

21.9

21.1

21.5 ± 0.57

Nanoparticle, ng/m³

492.7

497.8

495.25 ± 3.61

1,013.4

1,044.6

1,029.0 ± 22.06

1,230.6

1,655.2

1,442.90 ± 300.24

2,443.2

2,442.0

2,442.6 ± 0.85

Nanoparticle, #/cm³

5,430.0

5,631.0

5,530.50 ± 142.13

9,294.0

9,498.0

9,396 ± 144.25

10,940.0

12,688.0

11,814 ± 1,236.02

17,722.0

17,857.0

17,789.5 ± 95.46

PNC, #/cm³

7,256.0

8,481.0

7,868.50 ± 866.21

11,929.0

13,651.0

12,790 ± 1,212.64

15,242.0

16,835.0

16,038.5 ± 1,126.42

24,035.0

22,429.0

23,232.0 ± 1,135.61

Acetaldehyde, ppb

0.4

<LOD

–

<LOD

<LOD

–

<LOD

<LOD

–

<LOD

<LOD

–

Acetone, ppb

0.4

<LOD

–

<LOD

<LOD

–

<LOD

<LOD

–

1.4

5.3

3.35 ± 2.76

Ethanol, ppb

29.9

13.7

21.8 ± 11.46

<LOD

<LOD

–

108.7

35.5

72.1 ± 51.76

17.8

15.7

16.75 ± 1.49

Acetonitrile, ppb

<LOD

<LOD

–

0.5

<LOD

–

<LOD

<LOD

–

0.9

<LOD

–

Isopropyl alcohol, ppb

<LOD

81.3

–

<LOD

26.8

–

10.5

58.8

34.65 ± 34.15

55.8

49.3

52.55 ± 4.60

Benzene, ppb

2.6

N.D.

–

0.7

1.2

0.95 ± 0.35

0.5

<LOD

–

<LOD

6.6

–

Toluene, ppb

N.D.

N.D.

–

N.D.

N.D.

–

N.D.

N.D.

–

1.5

N.D.

–