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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:
02.08.2019 - 05.09.2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
no
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
99.5 µm
St. dev.:
4.4
Key result
Percentile:
D50
Mean:
211.1 µm
St. dev.:
9
Percentile:
D90
Mean:
509.9 µm
St. dev.:
14

The median particle size D50 (D (v, 0.5): 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1st test series: D50 = 220.1 μm

2nd test series: D50 = 202.1 μm

The average of the median particle size D50 was: D50 = 211.1 μm

The particle size D10 (D (v, 0.1): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1st test series: D10 = 103.9 μm

2nd test series: D10 = 95.1 μm

The average of the particle size D10 was: D10 = 99.5 μm

The particle size D90 (D (v, 0.9): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1st test series: D90 = 523.9 μm

2nd test series: D90 = 495.9 μm

The average of the particle size D90 was: D90 = 509.9 μm

The maximum was observed at approximately 200 μm. Additionally, a shoulder was observed at approximately 20 μm.

Conclusions:
The test item has a median particle size D50 = 211.1 µm.
Executive summary:

A study was conducted according to OECD TG 110, CIPAC MT 187 and ISO 13320 to determine the particle size distribution of the test item. The particle size distribution was determined using laser diffraction. Two test series were performed with the test item. The test item has a median particle size D50 = 211.1 µm, which was determined by laser diffraction measurement.

Description of key information

The test item has a median particle size D50 = 211.1 µm.

Additional information

A study was conducted according to OECD TG 110, CIPAC MT 187 and ISO 13320 to determine the particle size distribution of the test item. The particle size distribution was determined using laser diffraction. Two test series were performed with the test item. The test item has a median particle size D50 = 211.1 µm, which was determined by laser diffraction measurement (reference 4.5-1).