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Physical & Chemical properties

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:
2017-11-10 to 2018-04-06
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:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
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:
agglomerate
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
192.9 µm
Percentile:
D50
Mean:
192.9 µm
St. dev.:
6.8
Percentile:
D10
Mean:
19.1 µm
St. dev.:
1.2
Percentile:
D90
Mean:
561.8 µm
St. dev.:
38.5
Remarks on result:
other: The test item tended to agglomeration. The agglomeration had an influence on the test result.

The test item consisted of non-transparent particles which tended to agglomeration. The agglomeration could have influenced the test results. Median values were calculated from unrounded values.

Median particle size D (v, 0.5): 50% of particle volume or particle mass with lower particle diameter

1st test series: 191.9 µm

2nd test series: 193.9 µm

Average of the median particle size: 192.9 µm

Particle size D (v, 0.1): 10% of particle volume or particle mass with lower particle diameter

1st test series: 19.9 µm

2nd test series: 18.2 µm

Average of the particle size: 19.1 µm

Particle size D (v, 0.9): 90% of particle volume or particle mass with lower particle diameter

1st test series: 567.7 µm

2nd test series: 555.8 µm

Average of the particle size: 561.8 µm

The particle size distribution showed a polymodal distribution with two maxima. The first maximum was observed at approx. 20 µm and the second at approx. 300 µm.

Conclusions:
The particle size distribution of the test item was determined by laser diffraction (light scattering):
Average of the median particle size D (v, 0.5): 192.9 µm (standard deviation: 6.8 µm)
Average of the particle size D (v, 0.1): 19.1 µm (standard deviation: 1.2 µm)
Average of the particle size D (v, 0.9): 561.8 µm (standard deviation: 38.5 µm)
Executive summary:

The particle size distribution of the test item was determined by laser diffraction (light scattering):

Average of the median particle size D (v, 0.5): 192.9 µm (standard deviation: 6.8 µm)

Average of the particle size D (v, 0.1): 19.1 µm (standard deviation: 1.2 µm)

Average of the particle size D (v, 0.9): 561.8 µm (standard deviation: 38.5 µm)

The agglomeration of the test item could have incluenced the test results.

Description of key information

The particle size distribution of the test item was determined by laser diffraction (light scattering):

Average of the median particle size D (v, 0.5): 192.9 µm (standard deviation: 6.8 µm)

Average of the particle size D (v, 0.1): 19.1 µm (standard deviation: 1.2 µm)

Average of the particle size D (v, 0.9): 561.8 µm (standard deviation: 38.5 µm)

The agglomeration of the test item could have incluenced the test results.

Additional information