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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:
2009-07-30 to 2009-09-01
Reliability:
1 (reliable without restriction)
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
other: DIN EN ISO/IEC 17025
Deviations:
no
Principles of method if other than guideline:
The method is described in general in USP 429 and ISO 13320.
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Key result
Percentile:
D10
Mean:
8 µm
Remarks on result:
other: St.dev. was not indicated.
Key result
Percentile:
D50
Mean:
461 µm
Remarks on result:
other: St.dev. was not indicated.
Key result
Percentile:
D90
Mean:
977 µm
Remarks on result:
other: St.dev. was not indicated.

          

Conclusions:
The particle size distribution (volume distribution) of the test item was measured by laser diffraction according to DIN EN ISO/IEC 17025 . The averages of three measurements were as follows: d10: 8.0 µm, d50: 461 µm, d90: 977 µm.
Executive summary:

The particle size distribution (volume distribution) of the test item was measured by laser diffraction according to DIN EN ISO/IEC 17025. The averages of three measurements were as follows: d10: 8.0 µm, d50: 461 µm, d90: 977 µm.

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-07-28
Reliability:
1 (reliable without restriction)
Qualifier:
no guideline followed
Principles of method if other than guideline:
Particle size is determined from the angle of light diffracted by the particles.
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Key result
Percentile:
D10
Mean:
1.76 µm
Remarks on result:
other: St.dev. was not indicated.
Key result
Percentile:
D50
Mean:
5.47 µm
Remarks on result:
other: St.dev. was not indicated.
Key result
Percentile:
D90
Mean:
12.1 µm
Remarks on result:
other: St.dev. was not indicated.
Conclusions:
The particle size distribution (volume distribution) of the test item Lithium carbonate was measured by laser diffraction. The values were as follows: d10: 1.76 µm, d50: 5.47 µm, d90: 12.1 µm.
Executive summary:

The particle size distribution (volume distribution) of the test item Lithium carbonate was measured by laser diffraction. The values were as follows: d10: 1.76 µm, d50: 5.47 µm, d90: 12.1 µm.

Description of key information

The particle size distribution was measured by laser diffraction. At one study the averages of three measurements were as follows: d10: 8.0 µm, d50: 461 µm, d90: 977 µm,  at another  study the values were as follows:  d10: 1.76 µm, d50: 5.47 µm, d90: 12.1 µm. Differences may depend on the technique of production and / or measurement of particle size distribution incl. sample preparation. However, the range for the different qualities is comparable with the fraction equal / lowers 10 µm being always above 10 %.

Additional information