NF ISO 11050
Wheat flour and {durum} wheat semolina. Determination of impurities of animal origin.
La contamination des farines de blé tendre et des semoules de blé dur par des insectes, des acariens ou des souillures provenant de rongeurs, ne doit pas dépasser un seuil conforme à la notion de qualité hygiénique du produit céréalier. Les exigences sanitaires généralement requises dans les échanges commerciaux de farines et semoules ne tolèrent qu'un nombre limité de certaines catégories d'impuretés d'origine animale. La présente méthode, connue sous le nom anglo-saxon de "filth-test", permet de détecter et de dénombrer ces impuretés mieux qu'avec un examen visuel ou un' tamisage.
This document specifies a method for determining the content of impurities of animal origin in wheat flours, with or without additives and having an ash yield not exceeding a mass fraction of 0,75 %, and in durum wheat semolinas. This method permits the separation and quantification of contamination of animal origin, such as insects at all stages of their development and their fragments, rodent hairs and their fragments, and mites.
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