ISO 3431:1976
p
ISO 3431:1976
8747

Abstract

 Preview

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 

  •  :  Published
     : 1976-07
  •  : 1
     : 3
  •  : ISO/TC 226 Materials for the production of primary aluminium
  •  :
    71.100.10 Materials for aluminium production

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std 2 38 Paper
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