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Homepage>BS Standards>19 TESTING>19.120 Particle size analysis. Sieving>BS ISO 18747-2:2019 Determination of particle density by sedimentation methods Multi-velocity approach
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immediate downloadReleased: 2019-07-12
BS ISO 18747-2:2019 Determination of particle density by sedimentation methods Multi-velocity approach

BS ISO 18747-2:2019

Determination of particle density by sedimentation methods Multi-velocity approach

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Standard number:BS ISO 18747-2:2019
Pages:30
Released:2019-07-12
ISBN:978 0 580 89336 0
Status:Standard
DESCRIPTION

BS ISO 18747-2:2019


This standard BS ISO 18747-2:2019 Determination of particle density by sedimentation methods is classified in these ICS categories:
  • 19.120 Particle size analysis. Sieving

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.