Résumé
Applicable to products having contents up to 0.1 % (m/m). The method specified is not applicable in the presence of vanadium or high silica content. Molybdenum and chromium also interfere. The analysis bases on fusion of a test portion with sodium corbonate, extraction of the cooled melt with suphuric acid and the addition of hydrogen peroxide. Photometric measurement of the yellow coloured complex formed at a wavelength of about 420 nm.
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État actuel: AnnuléeDate de publication: 1975-03
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Edition: 1Nombre de pages: 2
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- ICS :
- 71.060.50 Sels
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