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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:
2017-10-24
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
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:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
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
Percentile:
D10
Mean:
124.6 µm
St. dev.:
0.8
Key result
Percentile:
D50
Mean:
581.9 µm
St. dev.:
3.15
Percentile:
D90
Mean:
1 243.9 µm
St. dev.:
7.75

Two test series of 3 measurements each were performed with the fine fraction of the test item.

Table 1: Results of measurements

Test

series 1

Test series 2 Average
D10 123.8 µm 125.4 µm 124.6 µm
D50* 578.7 µm 585.0 µm 581.9 µm
D90 1236.1 µm

1251.6 

µm

1243.9 

µm

* D50 = median diameter

The test item has a coarse fraction with a particle size of > 1000 µm of approximately 96.0 wt.-% and a fine fraction with a particle size of < 1000 µm of approximately 4.0 wt.-%.

Conclusions:
The median particle size of the test item was determined to be D50 = 582 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 test item has a coarse fraction with a particle size of > 1000 µm of approximately 96.0 wt.-% and a fine fraction with a particle size of < 1000 µm of approximately 4.0 wt.-%. The measurements were done with the fine fraction of the test item. The median particle size D50 of the test item was determined to be 582 µm.

Description of key information

The median particle size of the test item was determined to be D50 = 582 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 test item has a coarse fraction with a particle size of > 1000 µm of approximately 96.0 wt.-% and a fine fraction with a particle size of < 1000 µm of approximately 4.0 wt.-%. The measurements were done with the fine fraction of the test item. The median particle size D50 of the test item was determined to be 582 µm (reference 4.5-1).