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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:
June 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
other: NEN-ISO 13320, Particle Size analysis - laser diffraction methods, October 2009
Deviations:
no
GLP compliance:
no
Remarks:
according to Internal Management System
Type of method:
Laser scattering/diffraction
Type of distribution:
other: laser diffraction
Key result
Percentile:
D50
Mean:
240 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Key result
Percentile:
D10
Mean:
105 µm
St. dev.:
2
Remarks on result:
other: RSD 1.8%
Key result
Percentile:
D50
Mean:
240 µm
St. dev.:
6
Remarks on result:
other: RSD 2.4%
Key result
Percentile:
D90
Mean:
410 µm
St. dev.:
22
Remarks on result:
other: RSD 5.4%

Table 6.1: PSD characteristics of Hydroxyethylethylenediaminetriacetic acid, trisodium salt

Sample replicate

d10

d50

d90

 

[μm]

[μm]

[μm]

1

104

237

404

2

103

232

381

3

108

248

443

4

105

241

411

5

105

240

410

Average

105

240

410

St. Dev.

2

2

22

RSD

1,8%

2,4%

5,4%

 

They study authors calculated that:

  • < 100 μm: 9.1% v : v, < 10 μm: 0.06% v : v, < 5 μm: 0.02% v : v
Conclusions:
The average d10 was 105 μm, the average d50 was 240 μm, and the average d90 was 410 μm.
Executive summary:

The particle size distribution (PSD) was determined according to NEN-ISO Method 13320-1 and in accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008.

 

The PSD characteristics of the sample are reported in the table below.

 

Characteristics of the PSD

d10

105 μm

d50

240 μm

d90

410 μm

Fraction < 100 μm

9.1 % v/v

Fraction < 10 μm

0.06 % v/v

Fraction < 5 μm

0.02 % v/v

 

Description of key information

The particle size distribution (PSD) was determined according to NEN-ISO Method 13320-1.

Additional information

The average d10 was 105 μm, the average d50 was 240 μm, and the average d90 was 410 μm. Approximately 9.1% v:v. of particles were <100 μm, 0.06% v:v. were <10 μm and 0.02% v:v. were < 5 μm.