ISO 9504:1993
ISO 9504:1993


The principle of the method specified is to decompose a test portion by a mixture of nitric, hydrofluoric and perchloric acids, dissolving the salts in hydrochloric acid after evaporation to fumes of sulfuric acid, extracting the antimony from a dilute hydrochloric acid solution of the decomposed test portion into a solution of tri-n-octylphosphine oxide in 4-methyl-2-pentanone, aspirating the extract into the air/acetylene flame of an atomic absorption spectrometer, and measuring the absorbance at 217,6 nm. Applies to products having an antimony content equal to or greater than 0,001 % (m/m).

Informations générales 

  •  : Annulée
     : 1993-04
  •  : 2
     : 7
  •  : ISO/TC 175 Spath fluor
  •  :
    73.080 Minerais non métallifères

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