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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Acceptable, well documented study report which meets basic scientific principles
Principles of method if other than guideline:
sieving (150µm, 860µm, 1500µm)
analysis by electron microscope (SEM) and light microscope (LM)
Data evaluation sieve fraction < 150 µm is according to OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions); Methode B
GLP compliance:
no
Type of method:
sieving
Type of distribution:
counted distribution
Key result
Percentile:
D50
Mean:
2 000 µm
Remarks on result:
not measured/tested
Remarks:
Value of D50 not given in study report. It was deduced from the attached data.
No.:
#1
Size:
> 1 500 µm
Distribution:
68.5 %
No.:
#2
Size:
>= 860 - <= 1 500 µm
Distribution:
21.6 %
No.:
#3
Size:
>= 150 - <= 860 µm
Distribution:
9.1 %
No.:
#4
Size:
< 150 µm
Distribution:
0.8 %

Table 1. Result particle size distribution









































Fraction



w/w %



Dmin [µm]



Dmax [µm]



Dmean [µm]



< 150 µm



0.8



9.1



225.1



80.2



150 -860 µm



9.1



109.8



947.2



364.1



860 - 1500 µm



21.6



768.1



3802.2



1554.6



> 1500



68.1



582.1



10171.2



2804.4



 


Result aspect ratio ( A= maximum length/ width)


 









































Fraction



w/w %



Amin



max



Amean



< 150 µm



0.8



1.09



7.93



1.96



150 -860 µm



9.1



1.06



6.23



1.75



860 - 1500 µm



21.6



1.08



3.51



1.66



> 1500



68.1



1.03



3.76



1.58



 

Executive summary:

Karbach A, 2009

Particle size distribution was analysed after sieving (150, 860 and 1500 µm).

The fraction of the sample (> 1500 µm) with a mean diameter of 2804.4 µm was 68,1 % (w/w).

The fraction of the sample (860 µm - 1500 µm) with a mean diameter of 1554.6 µm was 21.6 % (w/w).

The fraction of the sample (150 µm - 860 µm) with a mean diameter of 364.1 µm was 9.1 % (w/w).

The fraction of the sample (> 150 µm) with a mean diameter of 80.2 µm was 0.8 %(w/w).

Description of key information

Particle size distribution was analysed after sieving (150, 860 and 1500 µm).


The fraction of the sample (> 1500 µm) with a mean diameter of 2804.4 µm was 68,1 % (w/w).


The fraction of the sample (860 µm - 1500 µm) with a mean diameter of 1554.6 µm was 21.6 % (w/w).


The fraction of the sample (150 µm - 860 µm) with a mean diameter of 364.1 µm was 9.1 % (w/w).


The fraction of the sample (> 150 µm) with a mean diameter of 80.2 µm was 0.8 %(w/w).


 


From available data, the value of D50 was determined at 2000 µm.

Additional information