# ISO 6091:1980 — Withdrawn and superseded ISO standards

For ISO 6091:1980, item title is Dried milk — Determination of titratable acidity (Reference method); status code is 9599; successor is ISO 6091:2010; withdrawn / published date is 1980-10-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 6091:1980 _(verified: appears in the quote below)_
- **Item title:** Dried milk — Determination of titratable acidity (Reference method) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 6091:2010
- **Withdrawn / published date:** 1980-10-01 _(verified: appears in the quote below)_

## What the source says

> 12283,IS,,ISO 6091:1980,Dried milk — Determination of titratable acidity (Reference method),Lait sec — Détermination de l'acidité titrable (Méthode de référence),1980-10-01,1,['67.100.10'],ISO/TC 34/SC 5,9599,,[55777],"['en','fr']",2,"<p>Applies to all types of dried milk. The principle constitutes in preparing reconstituted milk by adding water to a test portion of dried milk. The reconstituted milk is then titrated with sodium hydroxide solution to the pH of 8,40. The number of millimetres used in the titration is multiplied by the factor 2 in order to obtain the number of millimetres required to titrate a quantity of milk corresponding to 10 g of solids-not-fat to the pH of 8,50.</p>" 122

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).