Polydisperse Particle Standards - Nominal Size Range:

10 - 100 microns
Detailed review-results by weight/volume

Table of Results 

 Percentile

Method

Laboratory

 10 25 50 75 90

X 25.10

32.30

41.70

53.70

62.40
L

25.00

31.50

41.00

51.70

61.70
E

24.50

32.50

41.80

51.80

62.40
Mean

24.87

32.10

41.50

52.40

62.17
SD

0.26

0.43

0.36

0.92

0.33


(by weight)

 C

25.63

32.11

42.46

54.18

64.59
M

25.39

31.34

41.59

53.65

64.34
J

25.48

32.69

43.43

55.09

66.12
D

24.92

30.29

39.85

51.52

61.69
X

24.81

30.70

40.50

51.77

62.11
U

24.69

30.03

39.36

50.62

60.84
W

23.98

29.59

39.20

50.73

61.29
Mean

24.99

30.96

40.91

52.51

63.00
SD* 0.53

1.05

1.50

 1.65 1.86


(by volume)

F

26.80

33.90

42.90

54.20

64.50
Q

25.30

31.00

39.80

52.00

62.90

X1

25.50

30.70

39.60

51.80

62.10

X2

28.20

34.90

44.40

53.90

64.10

Mean

26.45

32.63

41.68

52.98

63.40

SD*

1.16

1.80

2.05

1.08

0.95
Final Mean size

x(n=14)

25.37

31.68

41.26

52.62

62.93
*SD (population)

xs n

1.00

1.44

1.57

1.39

1.48
SD (sample)

xs n-1

1.04

1.50

1.63

1.44

1.54
Uncertainty

95% confidence

2.08

3.00

3.26

2.88

3.08
 
   

Graphical Review
 - Individual Labs

Graphical Review
 - 95% Confidence Band

   
 

The Leading European Laboratories in this section were:
Bradford University UK
Coulter Electronics UK
Delft TU Holland
IFTS France
INRS France
Loughborough University UK
Seescan UK
Solvay et Cie Belgium
Whitehouse Scientific UK