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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:
2017-03-30
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
Remarks on result:
not measured/tested
Percentile:
D10
Mean:
53.3 µm
St. dev.:
0.7
Key result
Percentile:
D50
Mean:
171.5 µm
St. dev.:
3.1
Percentile:
D90
Mean:
438 µm
St. dev.:
11.25

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

Table 1: Results of particle size distribution

 

Test

series 1 (µm)

Test series 2

(µm)

Average

(µm)

D10 52.6 54.0 53.3
D50* 168.4 174.6 171.5
D90 426.7 449.2 438.0

* = median diameter

Conclusions:
The test item has a median particle size D50 = 172 µm, which was determined by laser diffraction measurement.
Executive summary:

A study was conducted according to OECD TG 110, ISO 13320 and EPA OPPTS 830.7520 to determine the particle size distribution of the test item. The particle size distribution was determined by using the laser diffraction method. 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 172 µm.

Description of key information

The test item has a median particle size D50 = 172 µm, which was determined by laser diffraction measurement.

Additional information

A study was conducted according to OECD TG 110, ISO 13320 and EPA OPPTS 830.7520 to determine the particle size distribution of the test item. The particle size distribution was determined by using the laser diffraction method (reference 4.5-1). 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 172 µm.

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