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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:
22 September 2017 - 25 September 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Key result
Percentile:
other: D[4,3] – Mass Moment Mean – De Brouckere Mean Diameter
Mean:
70.32 µm
St. dev.:
1.268
Key result
Percentile:
D10
Mean:
9.492 µm
Remarks on result:
other: St. dev. not specified.
Key result
Percentile:
D50
Mean:
55.35 µm
Remarks on result:
other: St. dev. not specified.
Key result
Percentile:
D90
Mean:
12.08 µm
Remarks on result:
other: St. dev. not specified.
No.:
#1
Size:
< 2 µm
Distribution:
3.94 %
No.:
#2
Size:
< 200 µm
Distribution:
97.4 %

Table 1. Results of particle size distribution

Size

Test number and fraction size [%]

1

2

3

4

5

Average

less than 2 µm

3.75

3.92

3.95

3.98

4.08

3.94

less than 200 µm

97.3

97.4

97.2

97.3

97.6

97.4

[µm]

d10

9.986

9.606

9.501

9.37

8.996

9.492

d50

55.99

55.59

55.32

55.02

54.85

55.35

d90

120.7

120.5

120.7

119.8

118.7

120.08

*d4,3, [µm]

70.98

70.79

71.18

70.56

68.09

70.32

Average d43,[µm]

70.32

Standard deviation,[µm]

1.268

Relative Standard Deviation,[%]

1.80
Conclusions:
The mass moment mean of the tested material is determined to be 70.32 µm. The percentiles of particle size are: d10 = 9.492 µm, d50 = 55.35 µm, and d90 = 120.08 µm.
Executive summary:

The determination of particle size distribution was carried out in accordance with the International Standard ISO 13320-1 and following the Principles of GLP. It was performed passing a laser through a test substance suspension and measuring the light scattered at different angles by a multi-element detector. The mass moment mean (De Brouckere Mean Diameter) of the tested material is determined to be 70.32 µm and the percentiles of particle size are: d10= 9.492 µm, d50= 55.35 µm, and d90= 120.08 µm.

Description of key information

Key study: Test method according to according to International Standard ISO 13320-1. GLP study. The mass moment mean of the tested material is determined to be 70.32 µm. The percentiles of particle size are: d10 = 9.492 µm, d50 = 55.35 µm, and d90 = 120.08 µm.

Additional information

Key study: The determination of particle size distribution was carried out in accordance with the International StandardISO 13320-1and following the Principles of GLP. It was performed passing a laser through a test substance suspension and measuring the light scattered at different angles by a multi-element detector. The mass moment mean (De Brouckere Mean Diameter) of the tested material is determined to be 70.32 µm and the percentiles of particle size are: d10= 9.492 µm, d50= 55.35 µm, and d90= 120.08 µm.