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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:
09 Jan 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
other: under consideration of: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
Qualifier:
according to
Guideline:
other: OECD Test Guideline 110: particle size distribution
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
other: crystalline and transparent particles
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
Storage conditions: Ambient temperature (10 to 30 °C), dry
Percentile:
D10
Mean:
12.8 µm
St. dev.:
0.28
Remarks on result:
other: Individual results: 13.0 µm, 12.6 µm
Percentile:
D50
Mean:
73.4 µm
St. dev.:
1.41
Remarks on result:
other: Individual results: 74.4 µm, 72.4 µm
Percentile:
D90
Mean:
227.8 µm
St. dev.:
2.26
Remarks on result:
other: Individual results: 226.2 µm, 229.4 µm
No.:
#1
Size:
< 1 µm
Distribution:
0 %
Remarks on result:
other: 2 test series
No.:
#1
Size:
< 10 µm
Distribution:
7.43 %
Remarks on result:
other: 2 test series distributions. 7.31% and 7.54%

Results
Median values were calculated from unrounded values.

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:
1sttest series L50= 74.4 µm; 2ndtest series L50= 72.4 µm
The average of the median particle size: L50= 73.4 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:
1sttest series: L10= 13.0 µm; 2ndtest series: L10= 12.6 µm
The average of the particle size: L10= 12.8 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:
1sttest series: L90= 226.2 µm; 2ndtest series: L90= 229.4 µm
The average of the particle size: L90= 227.8 µm

The particle size distribution showed a polymodal distribution. The maxima were seen at ca. 100 µm and ca. 1500 µm. A shoulder was seen at ca. 3 µm

Description of key information

D10: 12.8 µm

D50: 73.4 µm

D90: 227.8 µm

(OECD 110, Laser Diffraction/Scattering)

Additional information