Resumen
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.
Informaciones generales
-
Estado: PublicadoFecha de publicación: 1975-09Etapa: Norma Internacional confirmada [90.93]
-
Edición: 1Número de páginas: 5
-
Comité Técnico :ISO/TC 34/SC 6ICS :67.120.10
- RSS actualizaciones