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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:
November 16, 2016
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:
according to
Guideline:
other: CIPAC MT 59
Principles of method if other than guideline:
- Principle of test: Testing was performed according to the Collaborative International Pesticides Analytical Council Handbook, MT 59, Sieve Analysis. Wet sieve analysis consists of quantitative separation of a solid mixture into fractions with different ranges of particle size using appropriate seives, incorporating water as the principle aid to move particulate matter through the sieve array.
- Short description of test conditions: The test substance was mixed with water to create a suspension, and this suspension was rinsed over a set of 10 sieves, with the sieve with the largest mesh size on top, and progressively smaller mesh sizes beneath it.
- Parameters analysed / observed: Amount of substance that accumulated on each sieve.
GLP compliance:
yes
Type of method:
sieving
Type of particle tested:
other: Suspension containing particles
Type of distribution:
mass based distribution
No.:
#1
Size:
>= 9.5 mm
Distribution:
40.4 %
No.:
#2
Size:
>= 5.6 - < 9.5 mm
Distribution:
51.7 %
No.:
#3
Size:
>= 4 - < 5.6 mm
Distribution:
5.1 %
No.:
#4
Size:
>= 2.8 - < 4 mm
Distribution:
3.7 %
No.:
#5
Size:
>= 1 - < 2.8 mm
Distribution:
2.1 %
No.:
#6
Size:
>= 0.71 - < 1 mm
Distribution:
0.1 %
No.:
#7
Size:
>= 0.355 - < 0.71 mm
Distribution:
0.1 %
No.:
#8
Size:
>= 0.25 - < 0.355 mm
Distribution:
0.1 %
No.:
#9
Size:
>= 0.18 - < 0.25 mm
Distribution:
0 %
No.:
#10
Size:
>= 0.02 - < 0.18 mm
Distribution:
0.1 %

No sieve clogging was observed. The mean weight recovery was 104%.

Conclusions:
Over 90% of the substance had a particle diameter of > 5.6 mm, with 100% having a particle diameter of greater than 1.0 mm. Negligible amount of the material had a size less then 20 microns.
Executive summary:

The particle size of the test substance was determined using a "wet sieve" analysis. The particle size of three samples was determined. Over 90% of the substance had a particle diameter of > 5.6 mm, with 100% having a particle diameter of greater than 1.0 mm.  Negligible amount of the material had a size less then 20 microns.

Description of key information

=> 9.5 mm: 40.4 %

=> 5.6 - < 9.5 mm: 51.7%

=> 4.0 - < 5.6 mm: 5.1%

=> 2.8 - < 4.0 mm: 3.7%

=> 1.0 - < 2.8 mm: 2.1%

according to CIPAC MT 59, Sieve Analysis

Additional information