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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:
2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Qualifier:
according to guideline
Guideline:
other: European Commission Regulation (EC) No. 440/2008
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
Principles of method if other than guideline:
The measurements CIPAC MT 187: Particle Size Analysis by Laser Diffraction; ISO13320: 2009 Particle Size Analysis - Laser Diffraction Methods.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Key result
Percentile:
D10
Mean:
36 µm
St. dev.:
0
Key result
Percentile:
D50
Mean:
177.3 µm
St. dev.:
0
Key result
Percentile:
D90
Mean:
443.5 µm
St. dev.:
0

The particle size distribution showed a monomodal distribution. The maximum was observed at approximately 250 µm and a shoulder was observed at approximately 7 µm.

Due to the coarse particles the test item was sieved before the measurement (1000 µm mesh wire sieve). Only this fraction was measured with laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 177.3 µm. The particle size L10 of the test item deduced from the particle size distributions was 36.0 µm. The particle size L90 of the test item deduced from the particle size distributions was 443.5 µm.

Description of key information

The particle size distribution showed a monomodal distribution. The maximum was observed at approximately 250 µm and a shoulder was observed at approximately 7 µm.

Due to the coarse particles the test item was sieved before the measurement (1000 µm mesh wire sieve). Only this fraction was measured with laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 177.3 µm. The particle size L10 of the test item deduced from the particle size distributions was 36.0 µm. The particle size L90 of the test item deduced from the particle size distributions was 443.5 µm.

Additional information