95.99 Withdrawal of Standard Jan 18, 2007
ISO
ISO/TC 34/SC 3 Fruits and vegetables and their derived products
International Standard
67.080.01 Fruits, vegetables and derived products in general
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.
WITHDRAWN
ISO 5518:1978
95.99
Withdrawal of Standard
Jan 18, 2007