ISO 7693:1984
Ferrotungsten; Determination of tungsten content; Cinchonine gravimetric method

Standard No.

ISO 7693:1984

Release Date

1984

Published By

International Organization for Standardization (ISO)

Latest

ISO 7693:1984

Scope

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.

ISO 7693:1984 history

• 1984 ISO 7693:1984 Ferrotungsten; Determination of tungsten content; Cinchonine gravimetric method