Registration Dossier

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 JUN 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
other: BS ISO 13320-1:1999
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
Deviations:
not specified
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Remarks:
and optical microscope analysis
Type of distribution:
volumetric distribution
Percentile:
D50
Mean:
262.074 µm
St. dev.:
1.54

Full test results:

 

Run 1

Run 2

Run 3

Run 4

Run 5

* Average

Volume weighted mean

278.445

280.276

281.579

275.032

271.046

277.276

Median (d.50)

262.520

264.455

267.904

259.124

256.372

262.074

Mode (μm)

306.661

306.117

311.370

301.495

300.880

305.334

10 % of material is <

75.850

83.397

87.020

80.975

77.985

80.910

50 % of material is <

262.520

264.455

267.904

259.124

256.372

262.074

90 % of material is <

496.256

494.439

490.838

487.090

480.109

489.760

All results are in μm.

*Average result was calculated from the entirety of data captured in each run and was not a simple arithemetic mean.

1.22 % by volume of sample was eeen to be < 10.00 μm.

Standard deviation results:

 

Run 1

Run 2

Run 3

Run 4

Run 5

Stdev

%STDV

d10

75.850

83.397

87.020

80.975

77.985

3.94

4.86

d50

262.520

264.455

267.904

259.124

256.372

4.03

1.54

d90

496.256

494.439

490.838

487.090

480.109

5.75

1.17

d15.78

117.104

123.716

127.697

119.781

116.867

4.15

3.43

GSD

2.242

2.138

2.098

2.163

2.194

0.05

2.26

GSD = Geometric standard deviation

Coefficient of variation for d50 was less than 3 %; d10 and d90 were less than 5 %. Thus repeatability of the characteristic particles in the size distribution were within the acceptable limits as per the BS ISO 13320 -1 test standard.

Conclusions:
In particle size distribution analysis 0.40 % by volume of the sample was seen to be < 10.00 μm. Coefficient of variation for d50 was less than 3 %; d10 and d90 were less than 5 %. Thus repeatability of the characteristic particles in the size distribution were within the acceptable limits as per the BS ISO 13320 -1 test standard.
Executive summary:

The particle size distribution of the test item was assessed in a guideline study (OECD Guideline 111, ISO 13320, CIPAC MT 187) according to GLP by laser diffraction method. The test item has a d50 of 262.074 µm, a d90 of 489.760 µm and a d10 of 80.910 µm.

Description of key information

The particle size distribution of the test item was assessed in a guideline study (OECD Guideline 111, ISO 13320, CIPAC MT 187) according to GLP by laser diffraction method. The test item has a d50 of 262.074 µm, a d90 of 489.760 µm and a d10 of 80.910 µm.

Additional information