Norm

ISO 9502:1993 en

Metallurgical-grade fluorspar - Determination of silica content - Reduced-molybdosilicate spectrometric method

  • Deze norm is ingetrokken sinds 19-05-2010

31,57

Over deze norm

Status Ingetrokken
Aantal pagina's 6
Gepubliceerd op 18-03-1993
Taal Engels
The principle of the method specified is to decompose a test portion by alkaline fusion with sodium carbonate and subsequent acidification with hydrochloric acid in the presence of boric acid to complex fluoride, selective reduction to the blue molybdosilicic acid complex, spectrometric measurement of the absorbance of the coloured complex at a wavelength corresponding to the absorption maximum of approximately 650 nm. Applies to products having silica contents, expressed as SiO, in the range 0,2 % (m/m) to 30 % (m/m).

Details

ICS-code 73.080
Nederlandse titel Metallurgical-grade fluorspar - Determination of silica content - Reduced-molybdosilicate spectrometric method
Engelse titel Metallurgical-grade fluorspar - Determination of silica content - Reduced-molybdosilicate spectrometric method

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