# ISO 9233:1991 — Withdrawn and superseded ISO standards

For ISO 9233:1991, item title is Cheese and cheese rind — Determination of natamycin content — Method by molecular absorption spectrometry and by high-performance liquid chromatography; status code is 9599; successor is ISO 9233-1:2007 | ISO 9233-2:2007; withdrawn / published date is 1991-09-05, recorded from its source on 2026-08-05.

- **Identifier:** ISO 9233:1991 _(verified: appears in the quote below)_
- **Item title:** Cheese and cheese rind — Determination of natamycin content — Method by molecular absorption spectrometry and by high-performance liquid chromatography _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 9233-1:2007 | ISO 9233-2:2007
- **Withdrawn / published date:** 1991-09-05 _(verified: appears in the quote below)_

## What the source says

> 16865,IS,,ISO 9233:1991,Cheese and cheese rind — Determination of natamycin content — Method by molecular absorption spectrometry and by high-performance liquid chromatography,Fromage et croûtes de fromage — Détermination de la teneur en natamycine — Méthode par spectrométrie d'absorption moléculaire et par chromatographie liquide à haute performance,1991-09-05,1,['67.100.30'],ISO/TC 34/SC 5,9599,,"[40105,40106]","['en','fr']",10,"<p>Specifies a method which is suitable to control a maximum tolerance of natamycin on the cheese rind at a content of 1 mg/dm^2. The limit of detection is 0,5 mg/kg. Describes reagents, apparatus, sampling, and test procedure. Annex A is for information only.</p>"

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).