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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:
2021-05-11 to 2021-09-17
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)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Key result
Percentile:
D90
Mean:
8.09 µm
St. dev.:
0.34
Key result
Percentile:
D50
Mean:
3.01 µm
St. dev.:
0.16
Key result
Percentile:
D10
Mean:
0.53 µm
St. dev.:
0.01

D10: 10 Vol.-% of the particles have a smaller diameter

D50: 50 Vol.-% of the particles have a smaller diameter

D90: 90 Vol.-% of the particles have a smaller diameter

Two series of 3 measurements each were performed with the test item:

1st test series: D50 = 3.17 µm +/- 0.07 µm

2nd test series: D50 = 2.85 µm +/- 0.12 µm

The average of the median particle size D50 was: D50 = 3.01 µm +/- 0.16 µm

 

1st test series: D10 = 0.54 µm +/- 0.01 µm

2nd test series: D10 = 0.52 µm +/- 0.01 µm

The average of the median particle size D10 was: D10 = 0.53 µm +/- 0.01 µm

 

1st test series: D90 = 8.43 µm +/- 0.13 µm

2nd test series: D90 = 7.74 µm +/- 0.18 µm

The average of the median particle size D90 was: D90 = 8.09 µm +/- 0.34 µm

Conclusions:
The median particle size D50 of the test item was determined to D50 = 3.01 µm.
Executive summary:

The particle size distribution of the test item was determined by laser diffraction (light scattering) measurements according to ISO 13320. The test item consisted of reddish-brown to brownish-grey powder.

The average values of the particle sizes were determined to: 

D50 = 3.01 µm +/- 0.16 µm

D10 = 0.53 µm +/- 0.01 µm

D90 = 8.09 µm +/- 0.34 µm

Description of key information

The particle size distribution of the test item was determined by laser diffraction (light scattering) measurements according to ISO 13320. The test item consisted of reddish-brown to brownish-grey powder.

The average values of the particle sizes were determined to: 

D50 = 3.01 µm +/- 0.16 µm

D10 = 0.53 µm +/- 0.01 µm

D90 = 8.09 µm +/- 0.34 µm

Additional information