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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
First edition 2009-10-01
Deviations:
not specified
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
84.3 µm
Geometric standard deviation:
79.6 - 89
Key result
Percentile:
D50
Mean:
84.3 µm
St. dev.:
4.7
Percentile:
D10
Mean:
17.4 µm
St. dev.:
1
Percentile:
D90
Mean:
227.4 µm
St. dev.:
13.1

Table No. 1:Results of determination of particle size distribution

Determination

Median

(µm)

Diameter on Cumulative 90% (µm)

Diameter on Cumulative 10% (µm)

Span

1

74.0

227.5

14.9

2.9

2

84.5

247.6

16.9

2.7

3

84.3

227.4

17.4

2.5

4

79.4

215.8

16.1

2.5

5

84.9

215.6

17.2

2.3

Average

81.4

226.8

16.5

2.6

Standard deviation

4.7

13.1

1.0

0.2

Extended uncertainty

9.4

26.2

2.0

-

The value nearest to average was use as the final result of the test. That was the 3rdmeasurement.

Conclusions:
Particle size distribution of test substance, Direct Yellow 28, is characterized by the following:Determination Median: 84.3 µmDiameter on Cumulative 90%: 227.4 µmDiameter on Cumulative 10%: 17.4 µm
Executive summary:

The particle size distribution of the test substance, Direct Yellow 28, was determined. The laser diffraction method was used. The procedures used in the study were in accordance with:

Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002).

Standard ISO 13320: 2009 Particle size analysis – Laser diffraction methods, First edition 2009-10-01.

Particle size distribution of test substance, Direct Yellow 28, is characterized by the following:

Determination Median: 84.3 µm

Diameter on Cumulative 90%: 227.4 µm

Diameter on Cumulative 10%: 17.4 µm

Description of key information

Particle size distribution of test substance, Direct Yellow 28, is characterized by the following:

Determination Median: 84.3 µm

Diameter on Cumulative 90%: 227.4 µm

Diameter on Cumulative 10%: 17.4 µm

Additional information