Norm

ISO 1232:1976 en

Aluminium oxide primarily used for the production of aluminium - Determination of silica content - Reduced molybdosilicate spectrophotometric method

  • Deze norm is ingetrokken sinds 22-02-2016

31,57

Over deze norm

Status Ingetrokken
Aantal pagina's 5
Gepubliceerd op 01-09-1976
Taal Engels
The method is applicable to products having a silica content between 0.005 % (m/m) and 0.025 % (m/m) provided that the content of phosphorus pentoxide plus vanadium pentoxide does not exceed 0.02 % (m/m). The principle of the method is based on the formation of oxidized molybdosilicate (yellow) under well-defined conditions of acidity, concentration of reagents, temperature and time. Selective reduction of the complex in a highly acidic medium of sulphuric acid and in the presence of tartaric acid. Spectrophotometric measurement of the reduced coloured complex at a wavelength of about 815 nm. - Replaces ISO Recommendation R 1232-1970.

Details

ICS-code 71.100.10
Nederlandse titel Aluminium oxide primarily used for the production of aluminium - Determination of silica content - Reduced molybdosilicate spectrophotometric method
Engelse titel Aluminium oxide primarily used for the production of aluminium - Determination of silica content - Reduced molybdosilicate spectrophotometric method

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