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EC number: 234-522-7 | CAS number: 12007-92-0
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:
- 15/06/2010 - 16/06/2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- other: BS ISO 13320-1:999
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Deviations:
- not specified
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of method:
- determination of fibre length and diameter distributions
- Type of distribution:
- volumetric distribution
- Percentile:
- D90
- Mean:
- 424.293 µm
- St. dev.:
- 5.65
- Percentile:
- D10
- Mean:
- 52.462 µm
- St. dev.:
- 0.25
- Percentile:
- D50
- Mean:
- 170.849 µm
- St. dev.:
- 1.87
- Conclusions:
- The particle size distribution of sodium pentaborate granular was assessed according to BS ISO 13320-1:1999 and CIPAC MT 187. The coefficient of variation for d50 was less than 3 %; d10 and d90 were less than 5 %. Thus repeatability of the characteristic particles in the size distribution were within the acceptable limits as per the BS ISO 13320-1 test standard. The median (d50) was 170.849 μm.
- Executive summary:
The particle size distribution study was performed according to BS ISO 13320-1: 1999, CIPAC MT 187 and OECD guideline 110 under GLP compliance. Determination of fibre length and diameter distributions method was used. The coefficient of variation for d50 was less than 3 %; d10 and d90 were less than 5 %. The median (d50) was 170.849 μm.
Reference
Full test results:
|
Run 1 |
Run 2 |
Run 3 |
Run 4 |
Run 5 |
** Average |
Volume weighted mean |
206.472 |
208.131 |
210.343 |
218.379 |
211.471 |
210.959 |
Median (d.50) |
171.086 |
171.984 |
173.583 |
168.267 |
169.448 |
170.849 |
Mode (μm) |
184.988 |
184.414 |
187.289 |
174.668 |
177.405 |
181.244 |
*MMAD |
222.411 |
223.580 |
225.658 |
218.747 |
220.282 |
222.103 |
10 % of material was < |
52.358 |
52.648 |
52.859 |
52.287 |
52.168 |
52.462 |
50 % of material was < |
171.086 |
171.984 |
137.583 |
168.267 |
169.448 |
170.849 |
90 % of material was < |
416.444 |
420.596 |
425.418 |
432.336 |
428.670 |
424.293 |
All results are in μm.
* Mass Mean Aerodynamic Diameter
** Average result was calculated from the entirety of the data captured in each run and is not a simple arithmetic mean.
1.61 % by volume of sample was seen to be < 10.00 μm.
Standard deviation results:
Run No. |
1 |
2 |
3 |
4 |
5 |
STDVP |
% STDV |
d10 |
52.358 |
52.648 |
52.859 |
52.287 |
52.168 |
0.25 |
0.48 |
d50 |
171.086 |
171.984 |
173.583 |
168.267 |
169.448 |
1.87 |
1.09 |
d90 |
416.444 |
420.596 |
425.418 |
432.336 |
428.670 |
5.65 |
1.33 |
d15.78 |
72.630 |
73.120 |
73.520 |
72.770 |
72.530 |
0.36 |
0.50 |
GSD* |
2.356 |
2.352 |
2.361 |
2.312 |
2.336 |
0.02 |
0.75 |
MMAD |
222.411 |
223.580 |
225.658 |
218.747 |
220.282 |
2.43 |
1.09 |
* GSD = Geometric standard deviation
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 BS ISO 13320 -1 test standard.
Description of key information
The particle size distribution study was performed according to BS ISO 13320-1: 1999, CIPAC MT 187 and OECD guideline 110 under GLP compliance. Determination of fibre length and diameter distributions method was used. The coefficient of variation for d50 was less than 3 %; d10 and d90 were less than 5 %. The median (d50) was 170.849 μm.
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