ISO 5518:1978
Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method
Reference number
ISO 5518:1978
Edition 1
1978-05
Withdrawn
ISO 5518:1978
11572
Withdrawn (Edition 1, 1978)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

  •  : Withdrawn
     : 1978-05
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 3
  • ISO/TC 34/SC 3
    67.080.01 
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