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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:
12 MAR 2010 - 03 AUG 2010
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 B: Fibre Length and Diameter Distributions
Version / remarks:
1981
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
13320-1
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
Deviations:
no
GLP compliance:
no
Remarks:
not necessary
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
9.8 µm
Remarks on result:
other: no standard deviation available
Percentile:
D10
Mean:
2 µm
Remarks on result:
other: no standard deviation available
Percentile:
D90
Mean:
167.77 µm
Remarks on result:
other: no standard deviation available

Visual inspection of the sample showed an irregular morphology.

The particle size distribution is bimodal.

For each test series fractions (left axis of the ordinate) and the sittings (right axis of the ordinate) are presented in volume % as a function of the particle size.

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

1st test series: L50 = 9 .839 µm

2nd test series: L50 = 9.689 µm

The average of the median particle size L50 is L50 = 9.76 µm

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

1st test series: L10 = 2.007 µm

2nd test series: L10 = 1.988 µm

The average of the particle size L10 is L10 = 2.00 µm

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

1st test series: L90 = 173.118 µm

2nd test series: L90 = 162.422 µm

The average of the particle size L90 is L90 = 167.77 µm

Conclusions:
The median particle size L50 of the test items deduced from the particle size distributions is 9.8 µm.
The particle size L10 of the test items deduced from the particle size distributions is 2.0 µm.
The particle size L90 of the test items deduced from the particle size distributions is 167.77 µm.
Executive summary:

The particle size of the test item was determined according to OECD Guideline 110, OPPTS 830.7520, CIPAC MT 187 and ISO 13320 -1, not under GLP, by laser diffraction (light scattering).

The median particle size L50 of the test items deduced from the particle size distributions is 9.8 µm.

The particle size L10 of the test items deduced from the particle size distributions is 2.0 µm.

The particle size L90 of the test items deduced from the particle size distributions is 167.77 µm.

Description of key information

The particle size of the test item was determined according to OECD Guideline 110, OPPTS 830.7520, CIPAC MT 187 and ISO 13320 -1, not under GLP by laser diffraction (light scattering).

The median particle size L50 of the test items deduced from the particle size distributions is 9.8 µm.

The particle size L10 of the test items deduced from the particle size distributions is 2.0 µm.

The particle size L90 of the test items deduced from the particle size distributions is 167.77 µm.

Additional information