Abstract Preview

The methods are applicable as alternatives to products for which the molar ratio NaF/AlF3 is equal to about 3. The principle of the flame emission method consists in atomization of the test solution in a flame of oxygen/hydrogen and determination by measurement of the intensity of the radiation at 589 nm. The principle of the flame atomic absorption method is based on atomization in an air/acetylene flame and measuremnt of the absorption of the 589 nm line emitted by a sodium hollow-cathode lamp. The preparation of the test solution is carried out by dissolution of a test portion in hydrochloric acid and water after attack by concentreted sulphuric acid.


General information

  • Status :  Published
    Publication date : 1974-11
  • Edition : 1
    Number of pages : 4
  • :
    ISO/TC 226
    Materials for the production of primary aluminium
  • 71.060.50
    Salts

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