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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:
2019-07-04
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
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:
16.26 µm
St. dev.:
0.297
Percentile:
D10
Mean:
3.66 µm
St. dev.:
0.057
Percentile:
D90
Mean:
294.8 µm
St. dev.:
0.707

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 = 16.05.3 µm

2nd test series: D50 = 16.47 µm

The average of the median particle size D50 is 16.26 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 = 3.62 µm

2nd test series: D10= 3.70 µm 

The average of the particle size D10 is 3.66 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 = 295.3 µm

2nd test series: L90 = 294.3 µm

The average of the particle size D90 = 294.8 µm.

Maxima were observed at approximately 0.6 μm, 8 μm, 60 μm and 300 μm.

Conclusions:
The median particle size D50 of the test item deduced from the particle size distributions was determined to be 16.26 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 16 .26 µm. The particle size D10 of the test item was determined to be 3.66 µm and the D90 was determined to be 294.8 µm respectively.

Description of key information

The median particle size D50 of the test item deduced from the particle size distributions was determined to be 16.26 µm.

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. 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 16 .26 µm. The particle size D10 of the test item was determined to be 3.66 µm and the D90 was determined to be 294.8 µm respectively.