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Diss Factsheets

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:
From the 29th of October to the 6th of November, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
no guideline followed
Principles of method if other than guideline:
SOP STR 071 - laser light scattering
The analysis was performed with and without 1 and 2 minutes of ultrasonics.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
ca. 85.668 µm
Remarks on result:
other: after 2 minutes of ultrasonic
Percentile:
D90
Mean:
ca. 158.278 µm
Remarks on result:
other: after 2 minutes of ultrasonic
Percentile:
D10
Mean:
ca. 41.312 µm
Remarks on result:
other: after 2 minutes of ultrasonic
Percentile:
D50
Mean:
ca. 128.375 µm
Remarks on result:
other: after 1 minute of ultrasonic
Percentile:
D90
Mean:
ca. 245.277 µm
Remarks on result:
other: after 1 minute of ultranic
Percentile:
D10
Mean:
ca. 56.307 µm
Remarks on result:
other: after 1 minute of ultrasonic

After 1 minute of ultrasonic:

Specific Weighted mean D (3,2): 98.391 µm

Vol. Weighed mean D (4,3): 140.703 µm

After 2 minutes of ultrasonic:

Specific Weighted mean D (3,2): 67.662 µm

Vol. Weighed mean D (4,3): 93.270 µm

Conclusions:
D50 = 85.668 µm (after 2 minutes of ultrasonic treatment)
Executive summary:

Method

The substance has been tested for granulometry by the volumetric distribution. The particle size distribution was analyzed using the Mastersizer 2000 tool, which uses the technique of laser diffraction to measure the size of particles. It measures the intensity of light scattered as a laser beam passes through a dispersed particulate sample. This data is then analyzed to calculate the size of the particles that created the scattering pattern.

Results

D10 = 41.312 µm (after 2 minutes of ultrasonic treatment)

D50 = 85.668 µm (after 2 minutes of ultrasonic treatment)

D90 = 158.278 µm (after 2 minutes of ultrasonic treatment)

Description of key information

D50 mean 128.375 µm  (1 minute of ultrasonic treatment)
D50 mean  85.668 µm (2 minutes of ultrasonic treatment)

Additional information

The substance has been tested for granulometry by the volumetric distribution. The particle size distribution was analyzed using the Mastersizer 2000 tool, which uses the technique of laser diffraction to measure the size of particles. It measures the intensity of light scattered as a laser beam passes through a dispersed particulate sample. This data is then analyzed to calculate the size of the particles that created the scattering pattern.