1-10 microns

Polydisperse Particle Standards - Nominal Size Range:

1 - 10 microns
Detailed review-results by weight/volume

Table of Results 

 Percentile

Method

Laboratory

 10 25 50 75 90


(by weight)

A

2.90

3.53

4.36

5.40

6.59

I

2.86

3.41

4.13

5.03

6.05

X

2.69

3.27

4.02

4.95

6.00

Y

2.66

3.27

3.99

4.80

5.67

Mean

2.78

3.37

4.13

5.05

6.08

SD*

0.10

0.11

0.15

0.22

0.33
 

M

2.89

3.37

4.07

5.01

6.21

J

 2.94

3.47

 4.24 5.22

6.46


(by weight)

R

2.89

3.38

4.12

5.13

6.37

X

2.93

3.40

4.08

5.03

6.09

W

3.04

3.55

4.28

5.24

6.43

S

2.97

3.57

4.53

5.21

6.42

Mean

2.94

3.46

4.22

5.14

6.33

SD*

0.05

0.08

0.16

0.09

0.13
Final Mean size

x(n=10)

2.88

3.42

4.18

5.10

6.23
*SD (population)

xs n

0.11

0.10

0.16

0.16

0.26
SD (sample)

xs n-1

0.12

0.11

0.17

0.17

0.28
Uncertainty

95% confidence

0.24

0.22

0.34

0.34

0.56
 
   
Graphical Review 
- Individual Labs 		 Graphical Review 
- 95% Confidence Band
 
 

The Leading European Laboratories in this section were:
Bradford University UK
Clausthal TU Germany
Delft TU Holland
HSE Sheffield UK
Loughborough University UK
Pavia University Italy
Whitehouse Scientific UK

 

Dispersion notes:

The standards may contain some agglomerates but, provided they are well dispersed in a liquid medium, the results will not be affected. The contents of each bottle should be emptied into a small container of capacity 50 - 100ml and 50ml water added (de-ionised preferably, but not essential). Place the container with sample in an ultrasonic bath for 20 minutes. Alternatively, an ultrasonic probe will give an excellent dispersion in about 10 seconds. There is no evidence of particle breakdown with excessive ultrasonics.

Important - store in a dry place.