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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:
2016
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 59 Sieve Analysis; CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules; CIPAC MT 169 Tap Density of Water Dispersible Granules
Deviations:
no
Principles of method if other than guideline:
Sieve analysis consisting of the quantitative separation of the test item into fractions of different particle size ranges by using of machine sieving method.
GLP compliance:
yes (incl. QA statement)
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Remarks on result:
not determinable because of methodological limitations
Key result
Percentile:
D10
Mean:
250 µm
Remarks on result:
other: Not the D10, but the sieve size (µm) which passes less than 10 % of the charged substance is presented.
Key result
Percentile:
D90
Mean:
2 000 µm
Remarks on result:
other: Not the D90, but the sieve size (µm) which passes more than 90 % of the charged substance is presented.
Conclusions:
The sieve size (µm) which passes less than 10 % of the charged substance is 250 µm.
The sieve size (µm) which passes more than 90 % of the charged substance is 2000µm
The mean particle size (by mass) is between 500µm and 1000 µm.
No particles below 100 µm.
Executive summary:

Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 μm.

The sieve size (µm) which passes less than 10 % of the charged substance is 250 µm.

The sieve size (µm) which passes more than 90 % of the charged substance is 2000µm

The mean particle size (by mass) is between 500µm and 1000 µm.

No particles below 100 µm.

Description of key information

Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 μm.

The sieve size (µm) which passes less than 10 % of the charged substance is 250 µm.

The sieve size (µm) which passes more than 90 % of the charged substance is 2000µm

The mean particle size (by mass) is between 500µm and 1000 µm.

No particles below 100 µm.

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