# ISO 1871:1975 — Withdrawn and superseded ISO standards

For ISO 1871:1975, item title is Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl method; status code is 9599; successor is ISO 1871:2009; withdrawn / published date is 1975-12-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 1871:1975 _(verified: appears in the quote below)_
- **Item title:** Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 1871:2009
- **Withdrawn / published date:** 1975-12-01 _(verified: appears in the quote below)_

## What the source says

> 6542,IS,,ISO 1871:1975,Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl method,Produits agricoles alimentaires — Directives générales pour le dosage de l'azote selon la méthode de Kjeldahl,1975-12-01,1,['67.050'],ISO/TC 34,9599,,[41320],"['en','fr']",5,"<p>Application to products containing only nitrogenous copounds which are directly determinable by the Kjeldahl method. The method consists in destructing of organic matter by sulphuric acid in the presence of a catalyst, rendering of the reaction product alkaline, distillation and titration of the liberated ammonia.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).