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EC number: 247-161-5 | CAS number: 25646-71-3
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:
- 14 Feb 2018 to 28 Mar 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The Department of Health of the Government of the United Kingdom
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- 542.128 µm
- Geometric standard deviation:
- >= 2.03 - <= 2.077
- Percentile:
- D10
- Mean:
- 156.275 µm
- St. dev.:
- 4.308
- Percentile:
- D50
- Mean:
- 442.645 µm
- St. dev.:
- 7.751
- Percentile:
- D90
- Mean:
- 835.414 µm
- St. dev.:
- 16.35
Reference
Full Test Results
|
RUN1 |
RUN2 |
RUN3 |
RUN4 |
RUN5 |
Average** |
Volume weighted mean |
481.172 |
476.077 |
460.788 |
468.169 |
485.309 |
474.303 |
Median |
450.131 |
444.102 |
429.932 |
438.717 |
450.719 |
442.645 |
Mode |
512.821 |
507.324 |
494.747 |
505.640 |
513.985 |
506.850 |
MMAD* |
551.296 |
543.911 |
526.557 |
537.316 |
522.016 |
542.128 |
d10(10% of material is<) |
161.912 |
157.704 |
150.567 |
152.321 |
159.567 |
156.275 |
d50(50% of material is<) |
450.131 |
444.102 |
429.932 |
438.717 |
450.719 |
442.645 |
d90(90% of material is<) |
843.609 |
838.978 |
812.708 |
822.288 |
859.267 |
835.414 |
All results are in µm
* Mass median aerodynamic diameter
** Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.
0.0 % by volume of sample was seen to be < 10.00 µm.
Standard Deviation results
RunNo. |
1 |
2 |
3 |
4 |
5 |
STDVP |
%STDVP |
d10(10%of material is<) |
161.912 |
157.704 |
150.567 |
152.321 |
159.567 |
4.308 |
2.8 |
d50(50%of material is<) |
450.131 |
444.102 |
429.932 |
438.717 |
450.719 |
7.751 |
1.8 |
d90(90%of material is<) |
843.609 |
838.978 |
812.708 |
822.288 |
859.267 |
16.350 |
2.0 |
d15.78(15.78%of material is<) |
221.780 |
216.259 |
207.013 |
211.215 |
218.705 |
5.280 |
2.5 |
GSD |
2.030 |
2.054 |
2.077 |
2.077 |
2.061 |
0.018 |
0.9 |
MMAD |
551.296 |
543.911 |
526.557 |
537.316 |
522.016 |
10.796 |
2.0 |
GSD = Geometric standard dev. of the lognormal particle size distribution (calculated from d50/d15.78)
STDVP = standard deviation of the population
% STDVP = percentage standard deviation of the population
Coefficient of variation for d50 is less than 3%; d10 and d90 are less than 5%. Thus repeatability of the characteristic particles in the size distribution are within the acceptable limits as per the ISO 13320-1 test standard.
Description of key information
d10 is 156.275 µm (ISO 13320, laser diffraction)
d50 is 442.645 µm (ISO 13320, laser diffraction)
d90 is 835.414 µm (ISO 13320, laser diffraction)
Additional information
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