Ferrotungsten — Determination of tungsten content — Cinchonine gravimetric method
NORMA vydaná dňa 1.3.1984
Označenie normy: ISO 7693:1984
Dátum vydania normy: 1.3.1984
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy 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.