ISO 5518:1978
ISO 5518:1978


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.

General information 

  •  :  Withdrawn
     : 1978-05
  •  : 1
     : 3
  •  : ISO/TC 34/SC 3 Fruits and vegetables and their derived products
  •  :
    67.080.01 Fruits, vegetables and derived products in general

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