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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:
2011-03-08
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Reference:
Composition 0
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Qualifier:
according to
Guideline:
other: DIN 4188
GLP compliance:
no
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Test material information:
Composition 1
No.:
#1
Size:
125 µm
Distribution:
2 %
No.:
#2
Size:
250 µm
Distribution:
66.4 %
No.:
#3
Size:
500 µm
Distribution:
27.2 %
No.:
#4
Size:
710 µm
Distribution:
3 %
No.:
#5
Size:
1 000 µm
Distribution:
1.2 %

About 66.4 % of the particles of the test item have a size of 250 µm, 27.2 % with 500 µm and the other percentage is equally distributed at 125 µm and at 710 and 1000 µm.

Mesh size

Quantity in %

1000 μm

1.2

710 μm

3.0

500 μm

27.2

250 μm

66.4

125 μm

2.0

<125 μm

0.0

Conclusions:
The largest share of particles of the test item had a size of 250 to 500 µm.
Executive summary:

A test using a sieving machine was performed to determine the particle size of the test item. 50 g of the test item were weighted and placed on the top sieve in the sieving machine. Using a speed of 270 rpm the sieving process ran for 10 minutes. The weight of the machine and the sieves was determined before and after the test. The disfference in the mass of the sieves was the proportion of the test items particles at this sieve size. It was detemined that more than 66 % of the test items particles had a size of 250 µm, ca. 27 % have a size of 500 µm. Smaller proportions were equally distributed below 250 µm and above 500 µm.

Description of key information

The largest share of particles of the test item had a size of 250 to 500 µm.

Additional information

A test using a sieving machine was performed to determine the particle size of the test item. 50 g of the test item were weighted and placed on the top sieve in the sieving machine. Using a speed of 270 rpm the sieving process ran for 10 minutes. The weight of the machine and the sieves was determined before and after the test. The disfference in the mass of the sieves was the proportion of the test items particles at this sieve size. It was detemined that more than 66 % of the test items particles had a size of 250 µm, ca. 27 % have a size of 500 µm. Smaller proportions were equally distributed below 250 µm and above 500 µm.