Reference number
ISO 5518:1978
© ISO 2024
ISO 5518:1978
Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method
Edition 1
1978-05
Withdrawn
Withdrawn (Edition 1, 1978)

Abstract

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

  • Status
     : Withdrawn
    Publication date
     : 1978-05
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 34/SC 3
    ICS :
    67.080.01 
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