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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:
February 12, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
31 µm
St. dev.:
1.06

Particle size (µm)
D10 D50 D90
Test serie 1 5.5 29.8 194.8
Test serie 2 5.7 31.3 197.8
Average 5.6 30.6 196.3
SD 0.14 1.06 2.12
Conclusions:
D50: 31 µm
Executive summary:

The particle size distribution was determined using laser diffraction, according to the ISO 13320. As measuring device, a Malvern Mastersizer 2000 was used. The powder was brought via a powder dispersing cell Scirocco 2000 into the laser light beam and the diffraction pattern is determined. From the diffraction pattern the particle size distribution was calculated. The measurements were run in duplicate.

The average D90 was calculated to be 196.3 µm, the average D50 was calcualted to be 30.6 µm and the average D10 was calculated to be 5.6 µm.

Conclusion

D50: 31 µm

Description of key information

D50: 31 µm

Additional information

ISO 13320 and OECD 110 - Laser scattering/diffraction