Norm

ISO 2828:1973 en

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

31,57

Over deze norm

Status Definitief
Aantal pagina's 3
Gepubliceerd op 01-12-1973
Taal Engels
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.

Details

ICS-code 71.100.10
Nederlandse titel Aluminium oxide primarily used for the production of aluminium - Determination of fluorine content - Alizarin complexone and lanthanum chloride spectrophotometric method
Engelse titel Aluminium oxide primarily used for the production of aluminium - Determination of fluorine content - Alizarin complexone and lanthanum chloride spectrophotometric method

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