ISO-1617 › Aluminium oxide primarily used for the production of aluminium -- Determination of sodium content -- Flame emission spectrophotometric method
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The method is applicable to sodium contents equal to or greater than 0.05 % (m/m). The principle of the procedure consists in the fusion, at a controlled temperature, of a test portion with a mixture oflithium carbonate and boron trioxide or a mixture of lithium carbonate and lithium tetraborate. Dissolution of the fused mass in hydrochloric acid. Aspiration of the solution into a flame and spectrophotometric measurement of the intensity of the light emitted at a wavelength of 589 nm. - Replaces ISO Recommendation R 1617-1970.
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71.100.10 (Materials for aluminium production)
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Document Number
ISO 1617:1976
Revision Level
1ST EDITION
Status
Superseded
Publication Date
Sept. 15, 1976
Committee Number
ISO TC 47/SC 7