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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:
April 11th, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: CIPAC MT 59 Sieve Analysis
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 169 Tap Density of Water Dispersible Granules
Deviations:
no
Principles of method if other than guideline:
Sieve analysis consists of the quantitative separation of test item into fractions of different particle size ranges by using of machine sieving method.
GLP compliance:
yes (incl. certificate)
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Test material information:
Composition 1
Specific details on test material used for the study:
Test item was used in its initial form.
Mass median aerodynamic diameter:
250 - 2 000 µm
Percentile:
D50
Mean:
250 - 2 000 µm
Remarks on result:
other: sieving test

DETERMINATION OF TAP DENSITY

Sample mass (W): 57.7 g

Sample volume after dropping (V): 182 ml

Tap density (D): 0.32 g/ml

SIEVE TEST

N. of sieves: 8

Sample mass (m, calculated): 50.7 g

Sample mass (weighed): 50.92 g

Sieve Residue mass gx (g) Residue rx(m/m) % Sum of residues Rx(m/m) %
Size (µm) Serial No.
<45 (receiver pan) receiver pan 0.00 0.0 99.3
45 20111588 0.00 0.0 99.3
63 20111627

0.01

0.0

99.2

100

31121141

0.88

1.7

99.2

250

20111667

13.34

26.2

97.5

500

16111554

25.89

50.8

71.3

1000

20111725

6.41

12.6

20.4

2000

24111027

3.20

6.3

7.9

4000

14111099

0.80

1.6

1.6

gx:the amount of material retained by the sieve x

rx: ratio * 100 of the amount of material retained by the sieve x and sample mass

Rx: the calculated sum of residues on all the x sieves. Therefore the residue Rx on sieve x and the residues on all coarser sieves were summed.

Conclusions:
Particle size distribution: 250 - 2000 µm
Executive summary:

Particle size distribution of the test item was determined according to the CIPAC MT 59 Sieve Analysis, CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules and CIPAC MT 169 Tap Density of Water Dispersible Granules test methods. Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 µm.

The particle size distribution of the test item was found to be in the range of 250 and 2000 µm.

Conclusion

Particle size distribution: 250 - 2000 µm

Description of key information

Particle size distribution: 250 - 2000 µm

Additional information

CIPAC MT 59, CIPAC MT 170 and CIPAC MT 169 - Sieve