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EC number: - | CAS number: -
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- June 25, 2007 - June 26, 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: study conform with ECB/TM/February 1996, part 5.2
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 007
- Report date:
- 2007
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: Directorate General JRC, Joint Research Centre. “Particle Size Distribution, Fibre Length and Diameter Distribution” Draft Guidance Document, EUR 20268 EN (2002), Part 5.2 “Laser scattering / diffraction” using the laser diffraction method.
- GLP compliance:
- yes (incl. QA statement)
- Type of distribution:
- other: The laser diffraction method.
Test material
- Details on test material:
- Identity: AES
Batch: LSF7
Purity: 80.3%
Appearance: Solid
Expiration date: February 15, 2008
Storage: In the refrigerator at about 4 °C
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Percentile:
- D50
- Mean:
- 13.5 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- other: mass median diameter (MMD)
- Mean:
- 0.3 - 70 µm
Any other information on results incl. tables
Particle Size Distribution of AES
[%] |
1st Run Particle Size [µm] |
2st Run Particle Size [µm] |
3st Run Particle Size [µm] |
4st Run Particle Size [µm] |
Mean Particle Size [µm] |
Stand. Dev. [±] |
5 |
1.45 |
1.44 |
1.37 |
1.29 |
1.4 |
0.074 |
10 |
3.29 |
3.34 |
2.95 |
2.66 |
3.1 |
0.318 |
50 |
13.83 |
14.04 |
13.44 |
12.67 |
13.5 |
0.604 |
90 |
30.42 |
31.51 |
31.89 |
29.65 |
30.9 |
1.023 |
The MMD of the test item indicates that 50% (by mass) of the particles are smaller than 13.5 µm
Applicant's summary and conclusion
- Conclusions:
- In conclusion, using the laser diffraction method to study the particle size of AES ranging between 0.3 μm and 300 μm, the mass median diameter (MMD) was determined to be 13.5 μm. The particle size distribution was found to range from approximately 0.30 μm to 70 μm.
- Executive summary:
The results obtained during the measurements showed no relevant difference. Therefore the study is considered to be valid and no further testing is necessary.
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