ISO 3431:1976
Sodium fluoride primarily used for the production of aluminium; Determination of soluble sulphates content; Turbidimetric method
- Standard No.
- ISO 3431:1976
- Release Date
- 1976
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 3431:1976
- Scope
- 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.
ISO 3431:1976 history
- 1976 ISO 3431:1976 Sodium fluoride primarily used for the production of aluminium; Determination of soluble sulphates content; Turbidimetric method
