# ISO 20998-2:2013 — Withdrawn and superseded ISO standards

For ISO 20998-2:2013, item title is Measurement and characterization of particles by acoustic methods — Part 2: Guidelines for linear theory; status code is 9599; successor is ISO 20998-2:2022; withdrawn / published date is 2013-08-07, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20998-2:2013 _(verified: appears in the quote below)_
- **Item title:** Measurement and characterization of particles by acoustic methods — Part 2: Guidelines for linear theory _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 20998-2:2022
- **Withdrawn / published date:** 2013-08-07 _(verified: appears in the quote below)_

## What the source says

> 43468,IS,,ISO 20998-2:2013,Measurement and characterization of particles by acoustic methods — Part 2: Guidelines for linear theory,Caractérisation des particules par des méthodes acoustiques — Partie 2: Théorie linéaire,2013-08-07,1,['19.120'],ISO/TC 24/SC 4,9599,,[78454],['en'],31,"<p>ISO 20998-2:2013 describes ultrasonic attenuation spectroscopy methods for determining the size distributions of a particulate phase dispersed in a liquid at dilute concentrations, where the ultrasonic attenuation spectrum is a linear function of the particle volume fraction. In this regime, particle?particle interactions are negligible. Colloids, dilute dispersions, and emulsions are within the scope of ISO

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).