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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
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:
Particle size is determined by laser diffraction using a Microtrac-S3000.
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Type of distribution:
mass based distribution
Percentile:
D10
Mean:
20.74 µm
Remarks on result:
other: Standard deviation not reported.
Percentile:
D50
Mean:
100.6 µm
Remarks on result:
other: Standard deviation not reported.
Percentile:
D90
Mean:
256.4 µm
Remarks on result:
other: Standard deviation not reported.
Conclusions:
Under the conditions of the study the D10 is 20.74 μm, the D50 is 100.6 μm and the D90 is 256.4 μm.
Executive summary:

The particle size is determined by laser diffraction using a Microtrac-S3000.

The powder sample is dispersed by vigorous stirring in deionized water and sonication with 40 W for 1 minute. The suspension is recycled through the cell, which is illuminated by three laser beams at different angles. Laser radiation is scattered by particles in all directions, collected by multi-element detectors and analyzed. The dependence of the intensity on the scattering angle is a function of particle size, refractive index, and wavelength of incident light. Exact determination of particle sizes is ensured by a single optical system. The results are calculated from the diffraction data according to the theoretical model and are presented in the form of particle size distribution, %.

Average particle size of 6 analyzed samples are reported.

Under the conditions of the study the D10 is 20.74 μm, the D50 is 100.6 μm and the D90 is 256.4 μm.

Description of key information

Under the conditions of the study the D10 is 20.74 μm, the D50 is 100.6 μm and the D90 is 256.4 μm.

Additional information

The particle size is determined by laser diffraction using a Microtrac-S3000.

The powder sample is dispersed by vigorous stirring in deionized water and sonication with 40 W for 1 minute. The suspension is recycled through the cell, which is illuminated by three laser beams at different angles. Laser radiation is scattered by particles in all directions, collected by multi-element detectors and analyzed. The dependence of the intensity on the scattering angle is a function of particle size, refractive index, and wavelength of incident light. Exact determination of particle sizes is ensured by a single optical system. The results are calculated from the diffraction data according to the theoretical model and are presented in the form of particle size distribution, %.

Average particle size of 6 analyzed samples are reported.

Under the conditions of the study the D10 is 20.74 μm, the D50 is 100.6 μm and the D90 is 256.4 μm.