ISO 6229:1980
ISO 6229:1980


Covers a method, the principle of which is based on the extraction from a test portion of compounds soluble in acetic acid solution and weighing of the residue after heating at 600 °C, removal from the residue, of silica by evaporation with hydrofluoric acid solution and of residual fluorides by heating with ammonia solution, and reweighing of the residue after heating at 600 °C. Is applicable to products having free silica contents equal to or greater than 0,05 % (m/m).

General information 

  •  :  Withdrawn
     : 1980-07
  •  : 1
     : 2
  •  : ISO/TC 47 Chemistry
  •  :
    71.060.50 Salts

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