90.93 Standard confirmed Jan 13, 2022
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 decomposing the organic matter, followed by reduction of trivalent iron by hydroxyammonium chloride, forming, in a buffered medium, of the stable iron(II)/1,10 phenanthroline complex, and photometric measuring of the red-coloured complex at a wavelength of 508 nm.
PUBLISHED
ISO 5517:1978
90.93
Standard confirmed
Jan 13, 2022
ABANDON
ISO/CD 5517