ISO 2828:1973
Aluminium oxide primarily used for the production of aluminium — Determination of fluorine content — Alizarin complexone and lanthanum chloride spectrophotometric method
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 1973 |
| No. of Pages | 3 |
| ICS Classification | 71.100.10 Materials for aluminium production |
| Committee | ISO/TC 226 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO |