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EC number: 204-635-6 | CAS number: 123-56-8
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2019-02-20 to 2019-02-25
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- sieving
- Type of particle tested:
- primary particle
- Type of distribution:
- other: sieving: mass based distribution; laser diffraction: volumetric distribution
- Percentile:
- other: Dv(10)
- Mean:
- 43.756 µm
- Remarks on result:
- other: The distribution is volume related, i.e. a Dv (10) means that 10% of the particles have a diameter < 43.756 µm and 10% of the particles have a diameter > 43.756 µm.
- Percentile:
- other: Dv(50)
- Mean:
- 137.638 µm
- Remarks on result:
- other: The distribution is volume related, i.e. a Dv (50) means that 50% of the particles have a diameter < 137.6 µm and 50% of the particles have a diameter > 137.6 µm
- Percentile:
- other: Dv(90)
- Mean:
- 554.336 µm
- Remarks on result:
- other: The distribution is volume related, i.e. a Dv (90) means that 90% of the particles have a diameter < 554.336 µm and 90% of the particles have a diameter > 554.336 µm.
- No.:
- #1
- Size:
- >= 2 mm
- Distribution:
- 88.64 %
- No.:
- #2
- Size:
- >= 1 - <= 2 mm
- Distribution:
- 8.45 %
- No.:
- #3
- Size:
- >= 0.5 - <= 1 mm
- Distribution:
- 1.7 %
- No.:
- #4
- Size:
- < 0.5 mm
- Distribution:
- 1.21 %
- Conclusions:
- Results from the hand sieve:
- 88.64 % of the particles are above 2 mm
- 8.45 % are above 1 mm and below 2 mm
- 1.71 % are above 0.5 mm and below 1 mm
- 1.21 % are below 0.5 mm
From the fraction smaller than 500 µm (1.21 % < 500 µm of the total sample) a volume related particle size distribution was recorded:
Dv (10): 43.756 µm
Dv (50): 137.638 µm
Dv (90): 554.336 µm (hand sieve error) - Executive summary:
Results from the hand sieve:
- 88.64 % of the particles are above 2 mm
- 8.45 % are above 1 mm and below 2 mm
- 1.71 % are above 0.5 mm and below 1 mm
- 1.21 % are below 0.5 mm
From the fraction smaller than 500 µm (1.21 % < 500 µm of the total sample) a volume related particle size distribution was recorded:
Dv (10): 43.756 µm
Dv (50): 137.638 µm
Dv (90): 554.336 µm (hand sieve error)
Reference
Results mass based distribution:
First sieving over a 2 mm sieve
- The resulting material (11.36 % < 2 mm of the total sample) was then sieved over a 1 mm sieve.
- The resulting material (2.91 % < 1 mm of the entire sample) was then sieved over a 500 µm sieve.
Results from volumetric distribution ISO13320:
From the fraction smaller than 500 µm (1.21 % < 500 µm of the total sample), a dry particle size distribution was performed by laser diffraction (Malvern mastersizer 3000).
Name Dispersing medium: Dry dispersion
Refractive index dispersing medium: 1.000
Fraunhofer scattering model
Analysis Mode: Universal
Weighted variance: 0.33
Laser shadowing: 0.46 %
Concentration: 0.0054 %
Width: 3.710
Uniformity: 1.352
Specific surface: 65.08 mL/kg
Diameter (D) [3:2]: 92.198 µm
D [4:3]: 258.586 µm
Dv (10): 43.756 µm
Dv (50): 137.638 µm
Dv (90): 554.336 µm
The distribution is volume related, i.e. a Dv (50) means that 50% of the particles have a diameter < 137.6 µm and 50% of the particles have a diameter > 137.6 µm.
Description of key information
Results from the hand sieve:
- 88.64 % of the particles are above 2 mm
- 8.45 % are above 1 mm and below 2 mm
- 1.71 % are above 0.5 mm and below 1 mm
- 1.21 % are below 0.5 mm
From the fraction smaller than 500 µm (1.21 % < 500 µm of the total sample) a volume related particle size distribution was recorded:
Dv (10): 43.756 µm
Dv (50): 137.638 µm
Dv (90): 554.336 µm (hand sieve error)
Additional information
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