Codes & Standards - Purchase
ISO 3431:1976
Sodium fluoride primarily used for the production of aluminium -- Determination of soluble sulphates content -- Turbidimetric method
SKU: iso_008747_102963
Published by ISO
Publication Year 1976
1 Edition
3 pages
Product 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.