90.93 Standard confirmed Aug 26, 2024
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
After incineration of the product at 525 +/- 25 degrees centigrade the method consists in a) in the case of total ash: addition of an excess of standard volumetric sulphuric acid solution and back titration with standard volumetric sodium hydroxide solution, b) in the case of water-soluble ash: extraction of the ash with hot water and neutralization of the aqueous extract with standard volumetric sulphuric acid solution.
PUBLISHED
ISO 5520:1981
90.93
Standard confirmed
Aug 26, 2024