Ferrotungsten — Determination of tungsten content — Cinchonine gravimetric method
NORM herausgegeben am 1.3.1984
Bezeichnung normen: ISO 7693:1984
Ausgabedatum normen: 1.3.1984
Zahl der Seiten: 4
Gewicht ca.: 12 g (0.03 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: The method is applicable to ferrotungsten having tungsten contents between 70 and 90 % (m/m). Specifies principle, reagents, apparatus, sample, procedure, expression of results and test report. It also specifies, in the annex, a spectrometric method for the determination of molybdenum which interferes with the determination.