ISO 13317-4:2014

Name: ISO 13317-4:2014 — Determination of particle size distribution by gravitational liquid sedimentation methods — Part 4: Balance method
SKU: ISO 13317-4:2014
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Determination of particle size distribution by gravitational liquid sedimentation methods — Part 4: Balance method

Название (английский):

ISO 13317-4:2014

Determination of particle size distribution by gravitational liquid sedimentation methods — Part 4: Balance method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 14 ноября 2014 г.
Издание:: ISO IS 13317 edition 1 version 1
ICS:: 19.120

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Описание (английский):

ISO 13317-4:2014 specifies the method for the determination of particle size distribution by the mass of particles settling under gravity in liquid. This method is based on a direct mass measurement and gives the mass distribution of equivalent spherical particle diameter. Typically, the gravitational liquid sedimentation method applies to samples in the 1 μm to 100 μm size range and where the sedimentation condition for particle Reynolds number less than 0,25 is satisfied.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview - ISO 13317-4:2014 (Balance method)

ISO 13317-4:2014 specifies a balance method for determining particle size distribution (PSD) by gravitational liquid sedimentation. The technique measures the mass of particles that settle under gravity in a liquid and yields a mass-based distribution of equivalent spherical (Stokes) diameters. It is intended mainly for particles in the approximate range 1 μm to 100 μm, and requires sedimentation conditions where the particle Reynolds number is less than 0.25 so that Stokes’ law applies. The method is a direct mass measurement approach and does not rely on fitting parameters.

Key technical topics and requirements

Principle: Sedimentation under gravity; particle diameter derived from settling time using Stokes’ law to obtain Stokes diameters. Results are cumulative by mass.

Measurement apparatus: Sedimentation container, dispersion bath, detection tray, time-controlled valve, precision electronic balance, controller and PC. Typical setup components include stirrer, glove box and inlet/bypass plumbing.

Balance precision: Electronic balance detection precision shall be at least 1% of the total particle mass collected in the detection tray.

Sample and dispersion:

Representative sampling and splitting per ISO 14488.
Dispersion procedures per ISO 14887; use suitable dispersing agents if needed.
Dispersion medium must avoid flocculation/agglomeration, be chemically stable, non-volatile and provide appropriate viscosity for measurement timing.

Concentration limits: Volume concentration should be below 0.1% to avoid hindered settling; if higher, a hindrance function must be applied.

Measurement steps: measure densities (particle and liquid), prepare and disperse suspension, record sedimentation curve G(t) (mass vs. time), stop when mass stabilizes, account for fines remaining in bath.

Data analysis: Differential intercept method (tangent extrapolation to obtain cumulative mass fractions) and matrix/response-function reduction for more complete inversion of G(t) to q(x). Results are reported as mass-based PSD following ISO 9276-1 representation guidance.

Practical applications and users

This ISO balance method is used where mass-based particle size distribution is needed for materials in suspension. Typical users:

Quality control and testing labs in pharmaceuticals, pigments, ceramics, mining, cement, and specialty chemicals

Materials scientists and process engineers evaluating powder dispersion, settling behavior or sedimentation stability

R&D teams requiring direct measurement of mass fractions by size when Stokes-diameter interpretation is appropriate

Related standards

ISO 13317-1: General principles and guidelines

ISO 13317-1/2/3: Other gravitational sedimentation parts (fixed pipette, X‑ray method)

ISO 9276-1: Graphical representation of PSD results

ISO 14488: Sampling and sample splitting

ISO 14887: Dispersion procedures

Keywords: ISO 13317-4:2014, particle size distribution, gravitational liquid sedimentation, balance method, Stokes diameter, sedimentation, mass-based PSD, dispersion medium, hindered settling.

ISO 13317-4:2014

Abstract

Похожие стандарты

Overview - ISO 13317-4:2014 (Balance method)

Key technical topics and requirements

Practical applications and users

Related standards

Технические детали

ISO 14488:2007

Particulate materials — Sampling and sample splitting for the determination of particulate properties

BS ISO 14887:2000

Sample preparation. Dispersing procedures for powders in liquids.

ISO 9276-1:1998

Representation of results of particle size analysis — Part 1: Graphical representation

BS ISO 13317-1:2024

Determination of particle size distribution by gravitational liquid sedimentation methods. General principles…