# ISO 21501-3:2007 — Withdrawn and superseded ISO standards

For ISO 21501-3:2007, item title is Determination of particle size distribution — Single particle light interaction methods — Part 3: Light extinction liquid-borne particle counter; status code is 9599; successor is ISO/PWI 21501-3 | ISO 21501-3:2019; withdrawn / published date is 2007-05-07, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21501-3:2007 _(verified: appears in the quote below)_
- **Item title:** Determination of particle size distribution — Single particle light interaction methods — Part 3: Light extinction liquid-borne particle counter _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/PWI 21501-3 | ISO 21501-3:2019
- **Withdrawn / published date:** 2007-05-07 _(verified: appears in the quote below)_

## What the source says

> 40276,IS,,ISO 21501-3:2007,Determination of particle size distribution — Single particle light interaction methods — Part 3: Light extinction liquid-borne particle counter,Détermination de la distribution granulométrique — Méthodes d'interaction lumineuse de particules uniques — Partie 3: Compteur de particules en suspension dans un liquide par extinction de la lumière,2007-05-07,1,['19.120'],ISO/TC 24/SC 4,9599,[21709],"[58072,75049]",['en'],12,"<p>ISO 21501-3:2007 describes a calibration and verification method for a light extinction liquid-borne particle counter (LELPC), which is used to measure the size and particle number concentration of particles suspended in liquid. The light extinct

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).