# ISO - 18747-2

## Determination of particle density by sedimentation methods - Part 2: Multi-velocity approach

active, Most Current
 Organization: ISO Publication Date: 1 June 2019 Status: active Page Count: 28 ICS Code (Particle size analysis. Sieving): 19.120
##### scope:

This document specifies an in situ method for the determination of the density of solid particles or liquid droplets (herein referred to as "particle") dispersed in liquid continuous phase. The method is based on direct experimental determination of particle velocity in these liquids or media in gravitational or centrifugal fields based on Stokes law. The particle density is calculated from experimentally determined particle velocities in different liquids or media, taking into account their dynamic viscosities and densities, respectively. The approach does not require the knowledge of particle size distribution but assumes that sedimentation relevant characteristics (e.g. volume, shape, agglomeration state) do not change. This document does not consider polydispersity with regard to particle density, i.e. all particles are assumed to be of the same material composition.

### Document History

18747-2
June 1, 2019
Determination of particle density by sedimentation methods - Part 2: Multi-velocity approach
This document specifies an in situ method for the determination of the density of solid particles or liquid droplets (herein referred to as “particle”) dispersed in liquid continuous phase. The...