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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2004-2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Study was carried out according to generally valid and internationally accepted testing guidelines and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: CIPAC method MT 170, CIPAC Handbook F - pg. 420
Deviations:
yes
Remarks:
calculation of residue Rx at the nearest 0.01 g and of the percentage of the original weighing at the nearest 0.01%
GLP compliance:
yes (incl. QA statement)
Remarks:
Assessment of conformity with GLP on March 5, 2004; certificate date 17th May 2004
Type of method:
sieving
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
> 600 - < 850 µm
Remarks on result:
other: St. dev. not provided
No.:
#1
Size:
>= 5 000 µm
Distribution:
0 %
No.:
#2
Size:
>= 2 000 - < 5 000 µm
Distribution:
2 %
No.:
#3
Size:
>= 1 000 - < 2 000 µm
Distribution:
25.77 %
No.:
#4
Size:
>= 850 - < 1 000 µm
Distribution:
11.06 %
No.:
#5
Size:
>= 600 - < 850 µm
Distribution:
25.71 %
No.:
#6
Size:
>= 500 - < 600 µm
Distribution:
9.11 %
No.:
#7
Size:
>= 400 - < 500 µm
Distribution:
8.93 %
No.:
#8
Size:
>= 200 - < 400 µm
Distribution:
12.2 %
No.:
#9
Size:
>= 150 - < 200 µm
Distribution:
1.55 %
No.:
#10
Size:
< 150 µm
Distribution:
3.56 %

Particle size distribution at receipt: Sample weighings : 273.6 g and 273.6 g.

Sieve  x  (µm)

Residue  rx   (%)

Sum  of  residues  Rx   (%)

1

2

Mean

1

2

Mean

5000

0.00

0.00

0.00

0.00

0.00

0.00

2000

1.44

2.57

2.00

1.44

2.57

2.00

1000

24.13

27.40

25.77

25.57

29.97

27.77

850

10.18

11.93

11.06

35.75

41.90

38.83

600

27.38

24.04

25.71

63.13

65.94

64.53

500

9.05

9.17

9.11

72.18

75.10

73.64

400

9.27

8.58

8.93

81.45

83.68

82.57

200

12.64

11.76

12.20

94.09

95.44

94.77

150

1.55

1.54

1.55

95.64

96.98

96.31

150

4.30

2.82

3.56

99.95

99.80

99.87

range  :    x1  =  200 µm  where  Rx  ³  90 %.
                 x2  =  2000 µm  where  Rx  £  10 %.

Material retained on 500 um test sieve : 73.64 % w/w.

Dust fraction through 200 µm test sieve : 5.36 % w/w.

Conclusions:
The mass medium diameter: >600 µm and <850 µm
Executive summary:

The particle size distribution of test item was determined according to CIPAC MT 170 guideline (using sieving method) and under GLP.

The mass medium diameter: >600 µm and <850 µm.

Description of key information

Determined by sieving:

>5000µm: 0.00%

2000-5000µm: 2.00%

1000-2000µm: 25.77%

850-1000µm: 11.06%

600-850µm: 25.71%

500-600µm: 9.11%

400-500µm: 8.93%

200-400µm: 12.20%

150-200µm: 1.5%

<150µm: 3.56%

Additional information

A fully reliable experimental study, conducted according to a recognized CIPAC method and under GLP, is available. It is considered as a key study.

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