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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:
February 16 - April 21, 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The test was made in accodance with the "Revised OECD Principles of Good Laboratory Practice" (Paris, 1997)
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
Qualifier:
according to
Guideline:
other: ISO 13317-2
Deviations:
no
Principles of method if other than guideline:
ISO 13317-2 "Determination of particle size distribution by gravitational liquid sedimentation methods-Part 2:
Fixed pipette method", dated April, 15 2001
GLP compliance:
yes (incl. certificate)
Type of method:
sedimentation (gravitational settling)
Type of distribution:
other: sedimentation method
Specific details on test material used for the study:
Name: Disodium hydroxy(sulfonato)acetate
Batch No.: 080129
No.:
#1
Size:
103.95 µm
Distribution:
83.88 %
No.:
#2
Size:
59.04 µm
Distribution:
47.73 %
No.:
#3
Size:
44.96 µm
Distribution:
27.04 %
No.:
#4
Size:
37.33 µm
Distribution:
18.43 %
No.:
#5
Size:
32.32 µm
Distribution:
11.68 %
No.:
#6
Size:
27.47 µm
Distribution:
10.54 %
No.:
#7
Size:
23.32 µm
Distribution:
5.27 %
No.:
#8
Size:
18.46 µm
Distribution:
3.23 %
No.:
#9
Size:
15.64 µm
Distribution:
3.03 %
No.:
#10
Size:
13.67 µm
Distribution:
1.9 %

Two main studies were performed.

The values are the respective mean of both experiments.

Conclusions:
The graph of the particle size distribution of the test item shows not single peaks, but a continuous distribution roughly between 27 and 103 µm, leaving fractions of approx. 45% above 103µm and less than 10% below 27µm . The mean diameter is stated at 17.52 µm.

Description of key information

D50 of the substance is 17.5 µm.

Additional information

The graph of the particle size distribution shows no single peaks, but a continuous distribution roughly between 27 and 103 µm, leaving fractions of approximately 45% above 103 µm and less than 10% below 27 µm. The mean diameter is stated to be 17.52 µm. No particles smaller than 10 µm.