90.93 Standard confirmed Feb 20, 2024
ISO
ISO/TC 34/SC 6 Meat, poultry, fish, eggs and their products
International Standard
67.120.10 Meat and meat products
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.
PUBLISHED
ISO 3091:1975
90.93
Standard confirmed
Feb 20, 2024