Fruits, vegetables and derived products — Determination of iron content — 1,10- Phenanthroline photometric method
NORMA vydaná dňa 1.5.1978
Označenie normy: ISO 5517:1978
Dátum vydania normy: 1.5.1978
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: 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.