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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:
30 Jul 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
adopted in 2009
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
Storage conditions: ambient temperature (10 – 30 °C)
Percentile:
D50
Mean:
94 µm
St. dev.:
0.35
Remarks on result:
other: Individual test results: 93.8 µm, 94.3 µm
Percentile:
D10
Mean:
14.1 µm
St. dev.:
0
Remarks on result:
other: Individual results: 14.1 µm, 14.1 µm
Percentile:
D90
Mean:
292.7 µm
St. dev.:
9.19
Remarks on result:
other: Individual results: 286.2 µm, 299.2 µm
No.:
#1
Size:
< 2 µm
Distribution:
< 0.24 %
No.:
#2
Size:
< 2 µm
Distribution:
< 0.24 %

Results
Laser diffraction

The median particle size L50(D (v, 0.5): 50% of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1st test series L50= 93.8 µm; 2nd test series L50= 94.3 µm
The average of the median particle size: L50= 94.0 µm

The particle size L10(D (v, 0.1): 105 of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1st test series: L10= 14.1 µm; 2nd test series: L10= 14.1 µm
The average of the particle size: L10= 14.1 µm

The particle size L90(D (v, 0.9): 90% of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1st test series: L90= 286.2 µm; 2nd test series: L90= 299.2 µm
The average of the particle size: L90= 292.7 µm

The particle size distribution showed a polymodal distribution. Two maxima were seen at ca. 150 µm and 1500 µm. Shoulders were observed at ca. 3 µm and 40 µm.

Description of key information

D10: 14.1 µm

D50: 94.0 µm

D90: 292.7 µm

(OECD 110, Laser Diffraction/Scattering)

Additional information

The particle size distribution showed a polymodal distribution. Two maxima were observed at approximately 150 µm and approximately 1500 µm. Shoulders were observed at approximately 3 µm and 40 µm.

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