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.
Document identifier
ISO 7693:1984
Title
Ferrotungsten - Determination of tungsten content - Cinchonine gravimetric method
ISO Category
TC 132: Ferroalloys
Publication date
1984-03-01
International Relationship
BS 6200-3.33.3:1985
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