# ISO 6731:1989 — Withdrawn and superseded ISO standards For ISO 6731:1989, item title is Milk, cream and evaporated milk — Determination of total solids content (Reference method); status code is 9599; successor is ISO 6731:2010; withdrawn / published date is 1989-05-18, recorded from its source on 2026-08-05. - **Identifier:** ISO 6731:1989 _(verified: appears in the quote below)_ - **Item title:** Milk, cream and evaporated milk — Determination of total solids content (Reference method) _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 6731:2010 - **Withdrawn / published date:** 1989-05-18 _(verified: appears in the quote below)_ ## What the source says > 13187,IS,,ISO 6731:1989,"Milk, cream and evaporated milk — Determination of total solids content (Reference method)","Lait, crème et lait concentré non sucré — Détermination de la matière sèche (Méthode de référence)",1989-05-18,1,"['67.100.10','67.100.99']",ISO/TC 34/SC 5,9599,,[56815],"['en','fr']",3,
The method consists in pre-drying of a test portion on a boiling water-bath and subsequent evaporation of the remaining water in a drying oven at a temperature of 102+2 °C.
## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).