# ISO 9463:1990 — Withdrawn and superseded ISO standards

For ISO 9463:1990, item title is Nitric acid feed solutions from reprocessing plants — Spectrophotometric determination of plutonium after oxidation to plutonium(VI); status code is 9599; successor is ISO 9463:2009; withdrawn / published date is 1990-12-20, recorded from its source on 2026-08-05.

- **Identifier:** ISO 9463:1990 _(verified: appears in the quote below)_
- **Item title:** Nitric acid feed solutions from reprocessing plants — Spectrophotometric determination of plutonium after oxidation to plutonium(VI) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 9463:2009
- **Withdrawn / published date:** 1990-12-20 _(verified: appears in the quote below)_

## What the source says

> 17193,IS,,ISO 9463:1990,Nitric acid feed solutions from reprocessing plants — Spectrophotometric determination of plutonium after oxidation to plutonium(VI),Solutions nitriques d'entrée des usines de retraitement — Dosage spectrophotométrique du plutonium après oxydation en plutonium(VI),1990-12-20,1,['27.120.30'],ISO/TC 85/SC 5,9599,,[44276],"['en','fr']",5,"<p>The method is applicable, without interference, in the presence of numerous cations, it is applicable to test portions containing between 0,5 mg and 2,5 mg of plutonium. Specifies principle, chemical conditions, reagents, apparatus, operating procedure, expression of results and interferences.</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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).