# ISO 8672:1993 — Withdrawn and superseded ISO standards

For ISO 8672:1993, item title is Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy — Membrane filter method; status code is 9599; successor is ISO 8672:2014; withdrawn / published date is 1993-01-28, recorded from its source on 2026-08-05.

- **Identifier:** ISO 8672:1993 _(verified: appears in the quote below)_
- **Item title:** Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy — Membrane filter method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 8672:2014
- **Withdrawn / published date:** 1993-01-28 _(verified: appears in the quote below)_

## What the source says

> 16072,IS,,ISO 8672:1993,Air quality — Determination of the number concentration of airborne inorganic fibres by phase contrast optical microscopy — Membrane filter method,Qualité de l'air — Détermination de la concentration en nombre de fibres inorganiques en suspension dans l'air par microscopie optique en contraste de phase — Méthode du filtre à membrane,1993-01-28,1,['13.040.30'],ISO/TC 146/SC 2,9599,,[53413],"['en','fr']",25,"<p>The principle of the method specified is collecting a sample by drawing a measured quantity of air through a membrane filter by means of a battery-powered sampling pump, transforming the filter from an opaque membrane into a homogeneous optically transparent spec

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).