Тезис

A test portion is dissolved in water and acidified with hydrochloric acid. The carbon dioxide is eliminated by heating the solution. The lead is complexed and extracted with a solution of diethylammonium diethyldithiocarbamate in xylene. The solution is aspirated into an acetylene-air flame. The absorption of the 217 nm line or, alternatively, of the 283.3 nm line emitted by a lead hollow-cathode lamp is measured. The method is applicable to products containing more than 0.1 mg/kg of lead.


Общая информация 

  • Текущий статус
     : Отозвано
    Дата публикации
     : 1985-07
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 47 Chemistry
  • ICS
     :
    67.220.20 Food additives
    71.060.50 Salts

Жизненный цикл

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  2. Интернет-магазин
  3. Каталог стандартов
  4. МКС
  5. 67
  6. 67.220
  7. 67.220.20
  8. ISO 7110:1985