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ISO 3431:1976

Sodium fluoride primarily used for the production of aluminium -- Determination of soluble sulphates content -- Turbidimetric method
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ISO 3431:1976

Sodium fluoride primarily used for the production of aluminium -- Determination of soluble sulphates content -- Turbidimetric method

PUBLISH DATE 1976
ISO 3431:1976

Applicable to products having SO4 contents of more than 0.05 % (m/m).

Covers the dissolution of the test portion in hydrochloric acid and evaporation in hydrochloric acid solution for drying. Dissolution of the residue in a hydrochloric acid solution.

Measurement of the turbidity obtained by precipitation, under specified conditions, of barium sulphate using a spectrophotometer at a wavelength of about 470 nm or a photoelectric absorptiometer.

SDO ISO: International Organization for Standardization
Document Number ISO 3431
Publication Date July 15, 1976
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 47/SC 7
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