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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
26 June 2012 to 10 August 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed in accordance with OECD test guidelines in compliance with GLP and reported with a valid GLP certificate.
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
GLP compliance:
yes (incl. QA statement)
Type of method:
microscopic examination
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
> 22.486 - < 22.576 µm
Geometric standard deviation:
< 3
Key result
Percentile:
D50
Mean:
> 22.486 - < 22.576 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Key result
Percentile:
D50
Mean:
22.535 µm
St. dev.:
3

Full Test Results

 

RUN 1

RUN 2

RUN 3

RUN 4

RUN 5

**Average

Volume weighted Mean

26.377

26.467

26.614

26.612

26.668

26.547

Median (d.50)

22.576

22.562

22.563

22.487

22.486

22.535

Mode (μm)

24.233

24.163

24.105

24.026

24.028

24.112

*MMAD

22.576

22.562

22.563

22.487

22.486

22.535

10% of material is <

9.352

9.346

9.326

9.240

9.198

9.293

50% of material is <

22.576

22.562

22.563

22.487

22.486

22.535

90% of material is <

49.095

49.268

49.579

49.734

49.962

49.524

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.

11.98% by volume of sample was seen to be < 10.00μm.

Conclusions:
11.98 % by volume of sample was seen to be < 10.00 μm
Executive summary:

The test is conducted in accordance with ISO 13320:2009 and CIPAC MT 187 and will take into consideration OECD guideline 110. Test performed in compliance with the Principles of Good Laboratory Practice (GLP) and reported with a valid GLP certificate.

 

Test objective is to characterise the particle size distribution of the powder. The analysis is conducted initially using a visual microscope and is then undertaken more formally using a Laser Diffraction Particle Size Analyser.

11.98 % by volume of sample was seen to be < 10.00 μm

Description of key information

Value determined by experimental study in accordance with OECD test guidelines.

11.98% by volume of sample was seen to be < 10.00μm.

Additional information