No. of

sample

Brand

Country

of made

Samples

1

2

3

4

Mean

1

Signal

France

Track density (track∙mm⁻²)

5

7

5

13

7.5

Alpha particles concentration (ppm)

0.35

0.49

0.35

0.91

0.525

2

Sanino

Turkey

Track density (track∙mm⁻²)

13

11

20

7

12.75

Alpha particles concentration (ppm)

0.91

0.77

1.4

0.49

0.892

3

Frosty

China

Track density (track∙mm⁻²)

30

33

29

20

28

Alpha particles concentration (ppm)

2.1

2.31

2.03

1.4

1.96

4

Close up

Indonesia

Track density (track∙mm⁻²)

8

5

9

11

8.5

Alpha particles concentration (ppm)

0.56

0.35

0.63

0.77

0.595

5

Aquafresh

Turkey

Track density (track∙mm⁻²)

3

8

7

10

7

Alpha particles concentration(ppm)

0.21

0.56

0.49

0.7

0.49

6

Sanino

China

Track density (track∙mm⁻²)

6

8

12

11

9.25

Alpha particles concentration (ppm)

0.42

0.56

0.84

0.77

0.647

7

Signal2

Turkey

Track density (track∙mm⁻²)

11

8

9

12

10

Alpha particles concentration (ppm)

0.77

0.56

0.63

0.84

0.7

8

Colgate

Brazil

Track density (track∙mm⁻²)

17

9

14

8

11.25

Alpha particles concentration (ppm)

1.19

0.63

0.98

0.56

0.787

9

Crest

Germany

Track density (track∙mm⁻²)

10

8

5

6

7.25

Alpha particles concentration (ppm)

0.7

0.56

0.21

0.42

0.507