NF EN ISO 27107
Animal and vegetable fats and oils - Determination of peroxide value - Potentiometric end-point determination
ISO 27107:2008 specifies a method for the potentiometric end-point determination of the peroxide value, in milliequivalents of active oxygen per kilogram, of animal and vegetable fats and oils.The method is applicable to all animal and vegetable fats and oils, fatty acids, and their mixtures, with peroxide values from 0 meq to 30 meq of active oxygen per kilogram. It is also applicable to margarines and fat spreads with varying water content. The method is not applicable to milk fats or lecithins.
ISO 27107:2008 specifies a method for the potentiometric end-point determination of the peroxide value, in milliequivalents of active oxygen per kilogram, of animal and vegetable fats and oils.
The method is applicable to all animal and vegetable fats and oils, fatty acids, and their mixtures, with peroxide values from 0 meq to 30 meq of active oxygen per kilogram. It is also applicable to margarines and fat spreads with varying water content. The method is not applicable to milk fats or lecithins.
Le présent document décrit une méthode de détermination de l'indice de peroxyde avec point d'arrêt potentiométrique, des corps gras d'origines animale et végétale. L'échantillon est dissous. Après ajout d'iodure de potassium, l'iode libéré par les peroxydes est déterminé par voie volumétrique. Le point d'arrêt du titrage est déterminé selon une méthode électrochimique. Cette méthode s'applique à tous les corps gras d'origines animale et végétale, aux acides gras et à leurs mélanges dont l'indice de peroxyde est compris entre 0 meq (milliéquivalents) et 30 meq d'oxygène actif par kilogramme. L'application porte aussi sur les margarines et les pâtes à tartiner ayant une teneur en eau variable. En revanche, la méthode ne s'applique ni aux matières grasses laitières ni aux lécithines.
ISO 27107:2008 specifies a method for the potentiometric end-point determination of the peroxide value, in milliequivalents of active oxygen per kilogram, of animal and vegetable fats and oils. The method is applicable to all animal and vegetable fats and oils, fatty acids, and their mixtures, with peroxide values from 0 meq to 30 meq of active oxygen per kilogram. It is also applicable to margarines and fat spreads with varying water content. The method is not applicable to milk fats or lecithins.
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