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ISO 3431:1976

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

NORMA vydaná dňa 1.7.1976

Anglicky -
Elektronické PDF (55.20 EUR)
Anglicky -
Tlačené (55.20 EUR)


Francúzsky -
Elektronické PDF (55.20 EUR)
Francúzsky -
Tlačené (55.20 EUR)

The information about the standard:

Designation standards: ISO 3431:1976
Publication date standards: 1.7.1976
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Kategória: Technické normy ISO

Annotation of standard text ISO 3431:1976 :

Description / Abstract: 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.