Résumé
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.
Informations générales
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État actuel: PubliéeDate de publication: 1975-09Stade: Norme internationale confirmée [90.93]
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Edition: 1Nombre de pages: 5
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Comité technique :ISO/TC 34/SC 6ICS :67.120.10
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