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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:
2019-07-15 to 2019-07-31
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:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
7.75 µm
St. dev.:
0.24
Key result
Percentile:
D50
Mean:
41.78 µm
St. dev.:
1.633
Percentile:
D90
Mean:
151.77 µm
St. dev.:
10.18

Particle size distribution

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

 

Test series 1 (Figure 1):

D10:       7.92 µm

D50:     42.93 µm       (Median diameter)

D90:    158.97 µm

 

Test series 2 (Figure 2):

D10:       7.58 µm

D50:     40.62 µm       (Median diameter)

D90:    144.57 µm

 

Average

D10:       7.75 µm

D50:     41.78 µm       (Median diameter)

D90:    151.77 µm

Conclusions:
The median particle size of the test item was determined by laser diffraction measurement to be D50 = 42 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 of the test item was determined by laser diffraction measurement to be D50 = 42 µm.

Description of key information

The median particle size of the test item was determined by laser diffraction measurement to be D50 = 42 µm (reference 4.5 -1).

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 (reference 4.5 -1). 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 of the test item was determined by laser diffraction measurement to be D50 = 42 µm.