Estado : Retirada

Esta norma ha sido revisada por ISO 5518:2007

Resumen

The method consists in homogenizing the product, followed by dilution and acidification of a test portion, extraction of the acid by diethyl ether, then alkaline re-extraction of this acid and purifying by oxidation using acidified potassium dichromate, determination of the acid with a suitable spectrophotometer. The method cannot be applied in the presence of p-chlorobenzoic acid and cinnamic acid, respectively.

Informaciones generales

  • Estado
     : Retirada
    Fecha de publicación
     : 1978-05
    Etapa
    : Retirada de la Norma Internacional [95.99]
  • Edición
     : 1
    Número de páginas
     : 3
  • Comité Técnico :
    ISO/TC 34/SC 3
    ICS :
    67.080.01 
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  6. ISO 5518:1978