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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:
10.07.2019
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 - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
no
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Key result
Percentile:
D50
Mean:
166 µm
Remarks on result:
not measured/tested
Remarks:
St. dev. not measured
Key result
Percentile:
D10
Mean:
20 µm
Remarks on result:
not measured/tested
Remarks:
St. dev. not measured
Key result
Percentile:
D90
Mean:
494 µm
Remarks on result:
not measured/tested
Remarks:
St. dev. not measured

The median particle size D50: 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: D50 = 174.8 µm

2nd test series: D50 = 156.2 µm

The average of the median particle size D50 is 166 µm.

 

The particle size D10: 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: D10 = 21.4 µm

2nd test series: D10= 20.6 µm

 

The average of the particle size D10 is 21 µm.

 

The particle size D90: 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: L90 = 515.8 µm

2nd test series: L90 = 472.0 µm

The average of the particle size D90 = 494 µm.

Two maxima were observed at approximately 1 ¡rm and approximately 300 pm. Additionally, two shoulders were observed at approximately 10 ¡rm and approximately 100 pm.

Conclusions:
The median particle size D50 of the test item deduced from the particle size distributions was determined to be 166 µm.
Executive summary:

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 in order to determine the particle size distribution of the test item. The particle size distribution was determined using laser diffraction. Two test series of 3 measurements each were performed with the test item. The median particle size D50 of the test item was determined to be 166 µm. The particle size D10 of the test item was determined to be 21 µm and the D90 was determined to be 494 µm respectively.

Description of key information

The median particle size D50 of the test item deduced from the particle size distribution was determined to be 166 µm (reference 4.5 -1).

Additional information

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 in order to determine the particle size distribution of the test item (reference 4.5 -1). The particle size distribution was determined using laser diffraction. Two test series of 3 measurements each were performed with the test item. The median particle size D50 of the test item was determined to be 166 µm. The particle size D10 of the test item was determined to be 21 µm and the D90 was determined to be 494 µm respectively.