# ISO 20391-1:2018 — Withdrawn and superseded ISO standards

For ISO 20391-1:2018, item title is Biotechnology — Cell counting — Part 1: General guidance on cell counting methods; status code is 9599; successor is ISO 20391-1:2026; withdrawn / published date is 2018-01-19, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20391-1:2018 _(verified: appears in the quote below)_
- **Item title:** Biotechnology — Cell counting — Part 1: General guidance on cell counting methods _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 20391-1:2026
- **Withdrawn / published date:** 2018-01-19 _(verified: appears in the quote below)_

## What the source says

> 68879,IS,,ISO 20391-1:2018,Biotechnology — Cell counting — Part 1: General guidance on cell counting methods,Biotechnologie — Dénombrement des cellules — Partie 1: Lignes directrices générales relatives aux méthodes de dénombrement des cellules,2018-01-19,1,['07.080'],ISO/TC 276/SC 1,9599,,[87313],['en'],16,"<p>ISO 20391-1:2018 defines terms related to cell counting for biotechnology. It describes counting of cells in suspension (generally cell concentration) and cells adhered to a substrate (generally area density of cells). It provides key considerations for general counting methods (including total and differential counting, and direct and indirect counting) as well as for method selectio

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).