Content Handbook F

Outline of method

The determination of the dustiness of a granular product involves two operations. Firstly, a weighed amount of a granular product is allowed to fall under standard conditions in a test chamber, thus releasing dislodgeable dust. The second operation is the collection and/or assessment of the amount of airborne dust. This can be achieved by a gravimetric method, in which the generated dust is removed by an airflow, collected on a filter and weighed, or by an optical method in which the obscuration of a light-beam by the airborne dust is measured.