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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:
25.05.2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
41.7 µm
Key result
Percentile:
D90
Mean:
85.9 µm
St. dev.:
4.2
Key result
Percentile:
D10
Mean:
13.3 µm
St. dev.:
0.4
Conclusions:
Median=41.7 µmD90=85.9 µmD10=13.3 µm
Executive summary:

The particle size distribution of the test substance, Direct Blue 78 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 oftest substance,Direct Blue 78,is characterized by the following table:

 

Determination

Median

   (µm)

Diameter on Cumulative 90%

(µm)

Diameter on Cumulative 10%

(µm)

Span

(-)

Final result

41.7

85.9

13.3

1.7

Extended uncertainty

0.8

4.2

0.4

-

 

Extendeduncertainty was calculated by using a coverage factor of2.

Description of key information

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.

Only one study is available, in accordance to Guideline study.

Klimish score 1.

Additional information