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Particle size distribution (Granulometry)

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Description of key information

The result shows that the proportion of the test material having inhalable particle size (< 100 µm) is 0.199% indicating that the test material is essentially non-inhalable.

Additional information

The method used is designed to comply with that given in 'Particle Size Distribution, Fibre Length and Diameter Distribution', June 1996 European Commission technical guidance document.

Procedure:

Screening test (sieve method):

Test material (20.10 g) was sieved for approximately 10 minutes with the aid of a sieve brush through a 100 µm sieve. The mass of test material passing through the sieve was measured.

Results:

Screening test (sieve method)

The results of the sieving procedure are shown in the following table:

Sieve Aperture Size (µm)

100

Mass of test material transferred to sieve (g)

20.10

Mass of test material passed through sieve (g)

0.04

Test material less than sieve aperture size (%)

0.199 %

Conclusion:

Particle size data acquired for the test material is shown in the following Table:

Measurement

Method

Result

Proportion of test material having an inhalable particle size less than 100 µm

Sieve

0.199 %

The result indicates that the test material is essentially non-inhalable.