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ISO 3431:1976

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

Standard Details

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.

General Information

Status : Published
Standard Type: Main
Document No: ISO 3431:1976
Document Year: 1976
Pages: 3
Edition: 1
  • Section Volume:
  • ISO/TC 226. Materials for the production of primary aluminium
  • ICS:
  • 71.100.10 Materials for aluminium production

Life Cycle

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ISO 3431:1976
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