ISO 2828:1973

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Aluminium oxide primarily used for the production of aluminium — Determination of fluorine content — Alizarin complexone and lanthanum chloride spectrophotometric method

Published By	Publication Date	Number of Pages
ISO	1973-12	5

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Categories: 71.100.10 - Materials for aluminium production, ISO

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Description

Applicable to products having F contents of more than 0.003 % (m/m). Dissolution of a test portion by attack by sulphuric acid under pressure. Separation of the fluorine by distillation at a temperature of (150 1) °C by sulphuric acid. The distillation is carried out by the method described in ISO 1693. Formation of a blue coloured complex between fluorine and alizarin complexone/lanthanum chloride reagent at a pH between 4.5 and 4.6. Addition of acetone to increase the stability and sensitivity of the fluorine complex. Spectrophotometric measurement of the complex at a wavelength of about 620 nm. Has also been approved by the IUPAC.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1973-12
Pages Count	5
Language	France
Edition	1
File Size	297.0 KB
ICS Codes	71.100.10 - Materials for aluminium production

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ISO 2828:1973

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