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Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

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: No GLP study but other quality assurance

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Principles of method if other than guideline:
The granulometry, i.e. particle size, of the samples are determined by sieving. Sieving is a method where material is separated to finer and rougher sections determined by sieve size. Material is fed on the sieve and then the motion energy between the sieve and the material causes finer material to go through the sieve. The motion can be done efficiently by using ultrasonic washing device. The sieve with material is drowned to washing device and then lifts slowly up. The sieve is kept in the motion so that material is rotating on the sieve. Lifting up and ultrasonic washing produce an absorbing effect that makes finer material go through the sieve more efficiently. After sieving finer material goes on the top of the next and finer sieve and it's sieved again. This continues until the finest material is separated. Residuals separated by sieving are filtered with suction, then dried and weighed. Weighed residuals are reported and the particle size distribution is calculated. The sieves used in sieving are classified ASTM’s sieves and the grain sizes are from 0,020mm to 3,36mm /7/. The ultrasonic washing is done with Finnsonic M40i.
GLP compliance:
no
Remarks:
other Quality assurance
Type of method:
sieving
Type of distribution:
counted distribution

Test material

Constituent 1
Reference substance name:
Speiss, copper
EC Number:
273-836-9
EC Name:
Speiss, copper
Cas Number:
69029-97-6
IUPAC Name:
Speiss, copper
Details on test material:
B7, sample description: Speiss, representative (grinded, homogenised & sieved), sample code: BM_B7_2008, lab code: 09TT02684
speiss was crushed to an approximate size of 5-25 mm to obtain an homogeneous sample that was further grinded before granulometry testing

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D50
Mean:
ca. 126 µm
Remarks on result:
not measured/tested
Remarks:
std. dev.
Percentile:
other: D80
Mean:
ca. 236 µm
Remarks on result:
not measured/tested
Remarks:
stdev

Any other information on results incl. tables

Table 4: Particle size distribution of the crushed sample

Sample

 

09TT02684

 

Size

 

Retained

 

mesh

 mm

g

%

16

1.190

0.15

0.11

20

0.841

0.12

0.09

30

0.595

0.71

0.51

40

0.420

5.31

3.79

50

0.297

0.80

0.57

140

0.106

71.74

51.14

200

0.075

7.18

5.12

325

0.045

11.56

8.24

 

0.020

14.95

10.66

 

-0.020

27.75

19.78

Sum

 

140.27

100.00

Applicant's summary and conclusion

Conclusions:
Good quality study. Copper speiss has a granular form, with D50 > 126µm (grinded)