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ISO 5518:1978

Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method

Standard Details

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Status : WITHDRAWN
Standard Type: Main
Document No: ISO 5518:1978
Document Year: 1978
Pages: 3
Edition: 1
  • ICS:
  • 67.080.01 Fruits, vegetables and derived products in general

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ISO 5518:1978
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