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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:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Reason / purpose:
reference to same study
Principles of method if other than guideline:
Accurately weighed a 180 µm sieve and an empty pan. Accurately weighed 10.33 g of test substance into the sieve. Place sieve and pan on a sieve shaker and shook for 10 minutes. Re-weighed the sieve and the pan. Calculated the percentage of particles that were less than 180 µm. The particles less than 180 µm were analysed for particle size distribution using a Beckman Coulter LS 230 Particle Size Analyzer.
GLP compliance:
yes
Type of method:
other: particles analyzed using particle size analyzer
Type of distribution:
volumetric distribution
No.:
#1
Size:
< 180 µm
Distribution:
8.2 %

Approximately 8.2% of the particles were less than 180 µm by sieving.

Calculated Percentage of Particle Size Distribution

(for particles less than 180 µm)

Volume %

Particle Diameter (µm)

10

> 3.708

25

> 3.440

50

> 3.063

75

> 2.923

90

> 2.718

Conclusions:
8.2% < 180 µm
Executive summary:

Determination of granulometry: Accurately weighed a 180 µm sieve and an empty pan. Accurately weighed 10.33 g of test substance into the sieve. Place sieve and pan on a sieve shaker and shook for 10 minutes. Re-weighed the sieve and the pan. Calculated the percentage of particles that were less than 180 µm. The particles less than 180 µm were analysed for particle size distribution using a Beckman Coulter LS 230 Particle Size Analyzer.

Granulometry: 8.2% < 180 µm

Description of key information

Volumetric distribution

Additional information

8.2% <180 µm

Distribution: 10% >3.708 µm, 25% >3.44 µm, 50% >3.163 µm, 75% >2.923 µm, 90% >2.718 µm