scope:

The purpose of this document is to allow users to determine a sizeweighted fine fraction by the sedimentation method. The method in this part uses a liquid sedimentation technique to separate the fine fraction, which is then analysed for its substance of interest, e.g. crystalline silica. Informative annexes within this document describe specific methods for the evaluation of FF for specific bulk materials. This document is applicable for bulk materials that contain particles in the size range from 0,1 μm to 125 μm satisfying with the criteria given in this part and Part 3 of the document series. The current industrial minerals within the scope of this method are: quartz, clay, kaolin, talc, feldspar, mica, cristobalite, vermiculite, diatomaceous earth, barite and andalusite. The method may be applicable to other bulk materials, following full investigation and validation.