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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:
2018-06-27 to 2018-08-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Version / remarks:
1981
Deviations:
no
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Version / remarks:
1996
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Key result
Percentile:
D10
Mean:
9.2 µm
St. dev.:
0.13
Key result
Percentile:
D50
Mean:
157.4 µm
St. dev.:
2.36
Key result
Percentile:
D90
Mean:
524.7 µm
St. dev.:
6.27

Table 1: Particle size distribution:

Two test series of 3 measurements each were performed with the test item.  

Test-No.

D10

D50

D90

 

mean

SD

mean

SD

mean

SD

1 (n=2)

9.0

0.11

155.1

5.27

518.5

14.42

2 (n=2)

9.3

0.34

159.8

4.87

531.0

8.57

Average

9.2

0.13

157.4

2.36

524.7

6.27

Conclusions:
The test item TA-2 has a median particle size D 50 = 157 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981), ISO 13320 (2009) and CIPAC MT 187.

Description of key information

The test item TA-2 has a median particle size D 50  = 157 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981), ISO 13320 (2009) and CIPAC MT 187.

Additional information