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ISO 804:1976

Aluminium oxide primarily used for the production of aluminium — Preparation of solution for analysis — Method by alkaline fusion

Publication date:   Sep 1, 1976

95.99   Withdrawal of Standard   May 28, 2020

General information

95.99   Withdrawal of Standard   May 28, 2020

ISO

ISO/TC 226 Materials for the production of primary aluminium

International Standard

71.100.10   Materials for aluminium production

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Scope

The procedure for the preparation of a principal solution for chemical analysis requires at first an alkaline fusion of the test portion, either with a mixture of sodium carbonate and boric acid or with a mixture of sodium carbonate and sodium tetraborate. Subsequent dissolution of the molten mass in an excess of nitric acid and adjustment of an appropriate aliquot portion to pH 2. Replaces ISO Recommendation R804/1968.

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ISO 804:1976
95.99 Withdrawal of Standard
May 28, 2020