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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:
2010-04-29
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
1981
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
counted distribution
Key result
Percentile:
D50
Mean:
56.6 µm
St. dev.:
1.9
Key result
Percentile:
D10
Mean:
18.4 µm
St. dev.:
0.6
Key result
Percentile:
D90
Mean:
148 µm
St. dev.:
8.9

The median particle size L50(D (v, 0.5): 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1. test series: L50= 55.340 µm

2. test series: L50= 57.959 µm

The average of the median particle size L50was:

L50= 56.6 µm (SD: 1.9)

 

The particle size L10(D (v, 0.1): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1. test series: L10= 17.989 µm

2. test series: L10= 18.802 µm

The average of the particle size L10was

L10= 18.4 µm (SD: 0.6)

 

The particle size L90(D (v, 0.9): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1. test series: L90= 141.845 µm

2. test series: L90= 154.468 µm

The average of the particle size L90was:

L90= 148 µm (SD: 8.9)

 

The particle size distribution showed a monomodal distribution.

Conclusions:
The mean D10, D50 and D90 percentile were determined as L10 = 18.4 µm, L50 = 56.6 µm and L90 = 148 µm, respectively.
Executive summary:

A study was conducted to determine the particle size distribution of the test item according to OECD Test Guideline 110. Laser diffraction was used for this purpose. The test item was tested as a liquid dispersion in distilled water. The particle size distribution was determined in two test series. The mean D10, D50 and D90 percentile were determined as L10= 18.4 µm, L50= 56.6 µm and L90= 148 µm, respectively.

Description of key information

The mean D10, D50 and D90 percentile were determined as L10= 18.4 µm, L50= 56.6 µm and L90= 148 µm, respectively (reference 4.5-1).

Additional information

A study was conducted to determine the particle size distribution of the test item according to OECD Test Guideline 110. Laser diffraction was used for this purpose. The test item was tested as a liquid dispersion in distilled water. The particle size distribution was determined in two test series. The mean D10, D50 and D90 percentile were determined as L10= 18.4 µm, L50= 56.6 µm and L90= 148 µm, respectively.