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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:
2017-08-23
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
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:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Test material information:
Composition 1
Percentile:
D10
Mean:
17.3 µm
St. dev.:
0.05
Key result
Percentile:
D50
Mean:
156 µm
St. dev.:
1.5
Percentile:
D90
Mean:
621.1 µm
St. dev.:
5.65

Test series 1

D10: 17.3 µm

D50: 157.5 µm (median diameter)

D90: 615.4 µm

Test series 2

D10: 17.2 µm

D50: 154.5 µm (median diameter)

D90: 626.7 µm

Average

D10: 17.3 µm

D50: 156.0 µm (median diameter)

D90: 621.1 µm

Conclusions:
The test item has a median particle size D50 = 156 µm, which was determined by laser diffraction measurement.
Executive summary:

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 to determine the particle size distribution of the test item by using the laser diffraction method. Two test series of 3 measurements each were performed. The median particle size was determinded to be D50 = 156.0 µm.

Description of key information

The test item has a median particle size D50 = 156 µm, which was determined by laser diffraction measurement.

Additional information

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 to determine the particle size distribution of the test item by using the laser diffraction method. Two test series of 3 measurements each were performed with the test item. The test item has a median particle size D50 = 156.0 µm (reference 4.5-1).