Meat and meat products — Determination of nitrate content (Reference method)
NORMA vydaná dňa 1.9.1975
Označenie normy: ISO 3091:1975
Dátum vydania normy: 1.9.1975
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: The method consists in extracting of a test portion with hot water, precipitating of proteins and filtrating. Reduction of the extracted nitrates into nitrites by metallic cadmium. Formation of a red colouration by adding of sulfanilamide and nphthyl ethylenediamine hydrochloride and photometric measurement at a wavelength of 538 nm.