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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.


Общая информация 

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 1974-11
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 226 Materials for the production of primary aluminium
  • ICS
     :
    71.060.50 Salts

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  2. Интернет-магазин
  3. Каталог стандартов
  4. МКС
  5. 71
  6. 71.060
  7. 71.060.50
  8. ISO 2366:1974