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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:
November 27, 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
The particle size distribution of the material was measured via a light scattering method using a Mastersizer 2000E with a Hydro 2000MU (A) dispersion unit v5.60 (Malvern Instruments Ltd., Serial No. MAL102043). See instrument User Manual.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D10
Mean:
1.611 µm
Remarks on result:
other: St. dev. not provided
Key result
Percentile:
D50
Mean:
3.439 µm
Remarks on result:
other: St. dev. not provided
Percentile:
D90
Mean:
7.309 µm
Remarks on result:
other: St. dev. not provided

100 % of calcium titanate particles were within a distribution range of 0.8 to 208.9 μm. Surface Weighted Mean (D(3,2) = 2.930 μm and Volume Weighted Mean D(4,3) = 4.916 μm.

Conclusions:
The median particle size of the sample of calcium titanate, based on a volumetric size distribution, was determined to be D(0.5) = 3.439 μm. The light scattering data demonstrates that 100 % of particles are present in a distribution range of approximately 0.8 to 208.9 μm.
Executive summary:

The particle size distribution (granulometry) of a sample of calcium titanate (non nano) was calculated using a Mastersizer 2000E with a Hydro 2000MU (A) dispersion unit v5.60 (Malvern Instruments Ltd., Serial No. MAL102043). This technology uses a laser scattering technique to capture a light scattering pattern and generate a fundamental distribution of the size of particles in the sample, which is volume-based. Raw data is analysed / interpreted in line with the Fraunhofer model and Mie theory.

100 % of calcium titanate particles were found to exist in a distribution range of 0.8 to 208.9 μm, and the median particle size of the volume distribution or Mass Median Diameter (D(0.5)), which is the size in microns at which 50 % of the sample is smaller and 50 % is larger, was determined to be 3.439 μm. The Volume Weighted Mean (D(4,3)) and Surface Weighted Mean (D(3,2)) was calculated to be 2.930 and 4.916 μm, respectively. As the weighted residual was < 1 % (0.886 %), it can be decided that the calculated data was a good fit to the measurement data.

Description of key information

The particle size distribution (granulometry) of a sample of calcium titanate (non nano) was calculated using a Mastersizer 2000E with a Hydro 2000MU (A) dispersion unit v5.60 (Malvern Instruments Ltd., Serial No. MAL102043). This technology uses a laser scattering technique to capture a light scattering pattern and generate a fundamental distribution of the size of particles in the sample, which is volume-based. Raw data is analysed / interpreted in line with the Fraunhofer model and Mie theory.

100 % of calcium titanate particles were found to exist in a distribution range of 0.8 to 208.9 μm, and the median particle size of the volume distribution or Mass Median Diameter (D(0.5)), which is the size in microns at which 50 % of the sample is smaller and 50 % is larger, was determined to be 3.439 μm. The Volume Weighted Mean (D(4,3)) and Surface Weighted Mean (D(3,2)) was calculated to be 2.930 and 4.916 μm, respectively. As the weighted residual was < 1 % (0.886 %), it can be decided that the calculated data was a good fit to the measurement data.

Additional information