Reference number
ISO 804:1976
© ISO 2025
ISO 804:1976
Aluminium oxide primarily used for the production of aluminium — Preparation of solution for analysis — Method by alkaline fusion
Edition 1
1976-09
Withdrawn
Withdrawn (Edition 1, 1976)

Abstract

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.

General information

  • Status
     : Withdrawn
    Publication date
     : 1976-09
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 226
    ICS :
    71.100.10 
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