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ISO 7693:1984
M00001259
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ISO 7693:1984 Ferrotungsten - Determination of tungsten content - Cinchonine gravimetric method
standard by International Organization for Standardization, 03/01/1984
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Full Description
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.