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The method is principle to coating materials having lead contents in the range of about 0,01 % (m/m) to 2 % (m/m), may also be applicable to products with a total lead content of more than 2 % (m/m) when the requirements of precision does not exceed the specified values. two methods are given. The principle of the dry ashing method consists in evaporation of a test portion to dryness and ashing at 475 C and extraction of any lead in the residue with hydrochloric acid; that of the wet oxidation method consists in wet oxidation of a test portion with a mixture of sulfuric acid and hydrogen peroxide or with sulfuric acid and nitric acid and extraction of any lead in the residue with EDTA and ammonia solution.


Общая информация 

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 1984-10
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 256 Pigments, dyestuffs and extenders
  • ICS
     :
    87.040 Paints and varnishes

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  2. Интернет-магазин
  3. Каталог стандартов
  4. МКС
  5. 87
  6. 87.040
  7. ISO 6503:1984