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Particle size distribution (Granulometry)

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Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04/01/1999 - 03/08/1999
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: OPPTS 870.1300 (1998)
GLP compliance:
yes
Type of method:
cascade impaction
Type of distribution:
mass based distribution
Mass median aerodynamic diameter:
4.74 µm
Geometric standard deviation:
2.79
Remarks on result:
other: D10, D50 and D90 were not determined
Percentile:
D10
Remarks on result:
not measured/tested
Percentile:
D50
Remarks on result:
not measured/tested
Percentile:
D90
Remarks on result:
not measured/tested

The cumulative percentage by weight of the test article collected at each successive stage was plotted by computer as a probability value against the logarithmic value of the upper class limit of that stage. The point at which the cumulative distribution line crossed the 50 percentile was the estimate of the mass aerodynamic diameter (MMAD). The Geometric Standard deviation was calculated.

Conclusions:
MMAD was determined using a cascade impaction method.
MMAD (mass median aerodynamic diameter = 4.74 µm
GSD (geometric standard deviation) ±2.79 µm
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12/03/2018-02/05/2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
Deviations:
no
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Key result
Percentile:
D10
Mean:
3.2 µm
Remarks on result:
other: Mean value of two measurements (3.61 µm and 2.84 µm)
Key result
Percentile:
D50
Mean:
26.8 µm
Remarks on result:
other: Mean value of two measurements (28.54 µm and 25.03 µm)
Key result
Percentile:
D90
Mean:
57.4 µm
Remarks on result:
other: Mean value of two measurements (60.14 µm and 54.71 µm)
Conclusions:
Particle size distribution for dinotefuran was determined by laser diffraction in the size range of 0.02 to 2000 µm. Dinotefuran was determined to have d(0.1), d(0.5) and d(0.9) values of 3.2, 26.8 and 57.4 µm respectively.

Description of key information

MMAD was determined using a cascade impaction method.

MMAD (mass median aerodynamic diameter = 4.74 µm

GSD (geometric standard deviation) ±2.79 µm

Particle size distribution for dinotefuran was determined by laser diffraction in the size range of 0.02 to 2000 µm. Dinotefuran was determined to have d(0.1), d(0.5) and d(0.9) values of 3.2, 26.8 and 57.4 µm respectively.

Additional information