ISO-804 › Aluminium oxide primarily used for the production of aluminium -- Preparation of solution for analysis -- Method by alkaline fusion
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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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71.100.10 (Materials for aluminium production)
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Document Number
ISO 804:1976
Revision Level
1ST EDITION
Status
Superseded
Publication Date
Sept. 15, 1976
Committee Number
ISO TC 47/SC 7