The lead is extracted from a diluted test portion into a solution of diethylammonium diethyldithiocarbamate in xylene. The xylene extract is separated and aspirated into the acetylene/air flame of an atomic absorption spectrometer. The spectrometric measurements are carried out at a wavelength of about 217 nm or, alternatively, about 283 nm. The method is applicable to phosphoric acids having lead contents greater than 0.1 mg/kg.

General information

  • Status :  Withdrawn
    Publication date : 1981-10
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 47
  • 71.060.30

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