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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:
2017-06-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: CIPAC Handbook Volume K: Analysis of Technical and Formulated Pesticides, CIPAC MT 187
Version / remarks:
2003
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
other: particle volume or particle mass
Key result
Percentile:
D50
Mean:
27 µm
St. dev.:
1.15
Remarks on result:
other:
Remarks:
Mean of eight measurements
Percentile:
D10
Mean:
5 µm
St. dev.:
0.35
Remarks on result:
other:
Remarks:
Mean of eight measurements
Percentile:
D90
Mean:
201 µm
St. dev.:
46.42
Remarks on result:
other:
Remarks:
Mean of eight measurements

Particle Size Distribution:

 

L10D(v, 0.1)

[µm]

L50D(v, 0.5)

[µm]

L90D(v, 0.9)[µm]

Measurement 1

5.640

29.706

300.137

Measurement 2

4.961

26.936

218.871

Measurement 3

4.877

26.352

195.474

Measurement 4

4.637

26.24

161.464

Measurement 5

4.521

26.306

144.866

Measurement 6

4.838

27.377

197.79

Measurement 7

4.779

27.597

204.176

Measurement 8

4.592

26.699

187.884

Average Value

5

27

201

Conclusions:
The L10 D (v, 0.1) was determined to be 5 µm, the L50 D (v, 0.5) was determined to be 27 µm and the L90 D (v, 0.9) was determined to be 201 µm.
Executive summary:

The particle size distribution of a dried sample was determined using the laser diffraction method with dry dispersion. The particle size distribution of test item was determined following CIPAC MT 187. The dispersing energy was adjusted to 4.0 bar. Eight measurements have been performed. The following mean results were obtained. The L10D (v, 0.1) was determined to be 5 µm, the L50D (v, 0.5) was determined to be 27 µm and the L90D (v, 0.9) was determined to be 201 µm.

Description of key information

The particle size distribution of a dried sample was determined using the laser diffraction method with dry dispersion. The particle size distribution of test item was determined following CIPAC MT 187.

Eight measurements have been performed. The L10D (v, 0.1) was determined to be 5 µm, the L50D (v, 0.5) was determined to be 27 µm and the L90D (v, 0.9) was determined to be 201 µm.

Additional information