Résumé
The method allows inadequate cookingof the products to be detected. It applies to products having a urease activity of less than 1 mg of nitrogen per gram of product as received. For more active products the mass of test may be reduced. The principle consists in mixing of a ground test portion with a buffered urea solution, after keeping the mixture for 30 min at 30 C, neutralization of the ammonia liberated, with an exess of hydrochloric acid solution, and back-titration with standard volumetric hydroxide solution.
Informations générales
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État actuel: AnnuléeDate de publication: 1988-08Stade: Annulation de la Norme internationale [95.99]
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Edition: 2Nombre de pages: 2
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Comité technique :ISO/TC 34/SC 2ICS :67.200.20
- RSS mises à jour
Cycle de vie
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Précédemment
AnnuléeISO 5506:1978
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Actuellement
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Révisée par
PubliéeISO 5506:2018