ISO-804 › Aluminium oxide primarily used for the production of aluminium -- Preparation of solution for analysis -- Method by alkaline fusion

ISO-804 - 1ST EDITION - SUPERSEDED
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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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Document Number

ISO 804:1976

Revision Level

1ST EDITION

Status

Superseded

Publication Date

Sept. 15, 1976

Committee Number

ISO TC 47/SC 7