ISO 18747-1:2018 PDF

Scope: This document specifies a method for the determination of the density of solid particles or liquid droplets (below referred to generically as “particles”) dispersed in a liquid. The method is based on the fact that a particle wholly immersed in fluid experiences buoyancy equal to the weight of the fluid displaced by this particle (Archimedean principle), and if its mass force matches the buoyant force, it stops gravitational or centrifugal settling/creaming and the particle remains suspended. This implies that the density of the particle equals the density of the liquid. In this document, particle density determination is conducted by analysing the direction of the migration movement of particles dispersed in liquids with densities that are lower and higher than particle density. All particles are of the same material composition.

ISO 18747-1:2018 Referenced Document

ISO 13317-1:2001 Determination of particle size distribution by gravitational liquid sedimentation methods - Part 1: General principles and guidelines
ISO 13318-1:2001 Determination of particle size distribution by centrifugal liquid sedimentation methods - Part 1: General principles and guidelines
ISO 13318-2:2007 Determination of particle size distribution by centrifugal liquid sedimentation methods - Part 2: Photocentrifuge method
ISO 14887:2000 Sample preparation - Dispersing procedures for powders in liquids
ISO 20998-1:2006 Measurement and characterization of particles by acoustic methods - Part 1: Concepts and procedures in ultrasonic attenuation spectroscopy
ISO 26824:2013 Particle characterization of particulate systems - Vocabulary
ISO 2811-3:2011 Paints and varnishes - Determination of density - Part 3: Oscillation method
ISO 3105:1994 Glass capillary kinematic viscometers - Specifications and operating instructions
ISO/TR 13097:2013 Guidelines for the characterization of dispersion stability

2018 ISO 18747-1:2018 Determination of particle density by sedimentation methods - Part 1: Isopycnic interpolation approach