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.
Status: WithdrawnPublication date: 1978-05
Edition: 1Number of pages: 3
Technical Committee: ISO/TC 34/SC 3 Fruits and vegetables and their derived products
- ICS :
- 67.080.01 Fruits, vegetables and derived products in general
ISO 5518:1978Stage: 95.99
Got a question?
Check out our FAQs
+41 22 749 08 88
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)
Keep up to date with ISO
Sign up to our newsletter for the latest news, views and product information.