ISO 5518:1978
Fruits, vegetables and derived products; Determination of benzoic acid content; Spectrophotometric method

Standard No.

ISO 5518:1978

Release Date

1978

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2007-02

Replace By

ISO 5518:2007

Latest

ISO 5518:2007

Scope

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.

ISO 5518:1978 history

• 2007 ISO 5518:2007 Fruits, vegetables and derived products - Determination of benzoic acid content - Spectrophotometric method
• 1978 ISO 5518:1978 Fruits, vegetables and derived products; Determination of benzoic acid content; Spectrophotometric method