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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:
10/03/2010 - 10/03/2010
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:
other: •EUROPEAN COMMISSION, Directorate General XII-JRC, Science Research and Development-Joint Research Centre. “Particle Size Distribution, Fibre Length and Diameter Distribution” Guidance Document, ECB/TM/February 1996.
Deviations:
no
Principles of method if other than guideline:
Not relevant
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Key result
Percentile:
D50
Mean:
19 µm
Remarks on result:
other: range between 0.3 and 60 µm(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
other: D5
Mean:
< 3.3 µm
St. dev.:
0.13
Percentile:
D10
Mean:
< 5.5 µm
St. dev.:
0.248
Percentile:
D50
Mean:
< 19 µm
St. dev.:
0.138
Percentile:
D90
Mean:
< 35.1 µm
St. dev.:
0.283

For detailed results (distribution of different passages) see attached file results.doc.

Chemically Activated Carbon is a black powder. Under the microscope (with a magnification of 100), small-sized particles were observed.

 

A solubility test showed, that the test item is both: sparingly soluble and well dispersible in water. The particle size distribution of Chemically Activated Carbon was performed with two samples of the stock dispersion each measured in duplicate.

The results obtained during the measurements showed no relevant difference. Therefore the study is considered to be valid and no further testing is necessary.

Conclusions:
The mass median diameter (MMD) of chemically activated carbon is 19.0 µm, the particle size distribution ranges from 0.3 to 60.0 µm.
Executive summary:

The particle size distribution of chemically activated carbon was determined according to "EC ECB/TM/Feb. 1996" using the laser diffraction method. The mass median diameter (MMD) of chemically activated carbon was found to be 19.0 µm, the particle size distribution was found to range from approximately 0.3 to 60.0 µm.

Description of key information

experimental result klimisch 1 method ECB/TM/feb 1996
mass median diametre 19 µm

Additional information

range between 0,3 and 60 µm

Percentile

Mean

St. dev.

other: D5

< 3.3 µm

0.13

D10

< 5.5 µm

0.248

D50

< 19 µm

0.138

D90

< 35.1 µm

0.283