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Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
06 Jun - 15 Jul 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: CIPAC MT: Particle Size Analysis by Laser Diffraction
Deviations:
no
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction

Test material

Reference
Name:
Unnamed

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D50
Mean:
27.8 µm
Remarks on result:
other: St. dev.was not reported
Key result
Percentile:
D10
Mean:
4.5 µm
Remarks on result:
other: St. dev. was not reported
Key result
Percentile:
D90
Mean:
141.6 µm
Remarks on result:
other: St. dev. was not reported

Any other information on results incl. tables

Individual Results:

The test item consists of very small irregular shaped particles.

For each test series fractions (left axis of the ordinate) and the siftings (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:

1 st test series: L50 = 28.17 μm

2nd test series: L50 = 27.50 μm

The average of the median particle size L50 is L50 = 27.8 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 = 4.54 μm

2nd test series: L10 = 4.44 μm

The average of the particle size L10 is L10 = 4.5 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 = 144.41 μm

2nd test series: L90 = 138.88 μm

The average of the particle size L90 is L90=141.6μm

The percentage of particles with a particle size < 2 μm is approx. 4 % by mass of the total test item and the percentage of particles with a particle size > 200 μm is approx. 5 % by mass of the total test item.

Applicant's summary and conclusion

Conclusions:
The median particle size L50 of the test items deduced from the particle size distributions is 27.8 μm.
The particle size L10 of the test items deduced from the particle size distributions is 4.5 μm.
The particle size L9o of the test items deduced from the particle size distributions is 141 .6 μm.