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
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English, French
01-12-1973
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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.
| DevelopmentNote |
Also numbered as BS 4140-17(1986) (07/2005)
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| DocumentType |
Standard
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| Pages |
3
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| ProductNote |
This standard are referes to ISO/R 802, ISO/R 1693, ISO/R 2073
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| PublisherName |
International Organization for Standardization
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| Status |
Current
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| Standards | Relationship |
| SS-ISO 2828 : 1993 | Identical |
| NBN T 03 418 : 1983 | Identical |
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