# ISO 5518:1978 — Withdrawn and superseded ISO standards

For ISO 5518:1978, item title is Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method; status code is 9599; successor is ISO 5518:2007 | ISO/CD 5518; withdrawn / published date is 1978-05-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 5518:1978 _(verified: appears in the quote below)_
- **Item title:** Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 5518:2007 | ISO/CD 5518
- **Withdrawn / published date:** 1978-05-01 _(verified: appears in the quote below)_

## What the source says

> 11572,IS,,ISO 5518:1978,"Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method","Fruits, légumes et produits dérivés — Détermination de la teneur en acide benzoïque — Méthode spectrophotométrique",1978-05-01,1,['67.080.01'],ISO/TC 34/SC 3,9599,,"[41184,22899]","['en','fr']",3,"<p>The method consists in homogenizing the product, followed by dilution and acidification of a test portion, extraction of the acid by diethyl ether, then alkaline re-extraction of this acid and purifying by oxidation using acidified potassium dichromate, determination of the acid with a suitable spectrophotometer. The method cannot be applied in the presence of 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).