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Particle size distribution (Granulometry)

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Description of key information

Guidance Document on the Determination of Particle Size Distribution, Fibre Length and Diameter Distribution of Chemical Substances, EUR 20268 EN (2002). ISO 2591-1 Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate.
GLP study

Additional information

The particle size distribution of the test substance was determined. The sieving method was used.

Particle size distribution of test substance Humic acids, potassium salts is characterized by the following table:

Nominal aperture size

(µm)

Sieve fractions

(%)

Cumulative undersize (%)

1400

12.05

87.95

1000

14.47

73.48

710

14.35

59.13

500

14.89

44.24

355

12.91

31.33

250

13.18

18.15

180

8.37

9.78

125

5.38

4.40

100

3.40

1.00

80

0.98

0.03

< 80

0.03