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

Document Number: ISO 5518:1978
File Size: 868 kB
Language: English
Provider: ANSI
Shipping: Available for download - Link will be provided in My ComplianceOnline section

Price: $35.00
Product 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.

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