谷物、谷物基产品和动物饲料.使用Randall萃取方法测定天然脂肪和总脂肪含量

[中文适用范围]： 本国际标准规定了谷物、谷物制品和动物饲料脂肪含量的测定程序。 这些程序不适用于油籽和含油水果。 所用程序的选择取决于所分析材料的性质和成分以及进行分析的原因。 程序 A 是测定可直接提取的粗脂肪的方法，适用于除程序 B 范围内的材料以外的所有材料。 程序 B 是测定总脂肪的方法，适用于所有从中提取油和油脂的材料。 如果不事先水解，脂肪就无法完全提取。 注：大多数谷物以及动物源饲料、酵母、马铃薯蛋白、含乳制品的配合饲料、麸质以及经过挤压、压片和加热等加工的产品，在通过程序 B 进行测试时，其总脂肪含量明显较高与程序 A 相比。 参见附录 B。 [外文原描述]： ISO 11085:2015 specifies procedures for the determination of the fat content of cereals, cereal-based products, and animal feeding stuffs. These procedures are not applicable to oilseeds and oleaginous fruits. The choice of procedure to be used depends on the nature and composition of the material analysed and the reason for carrying out the analysis. Procedure A is a method for the determination of directly extractable crude fats, applicable to all materials, except those included within the scope of procedure B. Procedure B is a method for the determination of total fats, applicable to all materials from which the oils and fats cannot be completely extracted without prior hydrolysis. NOTE Most cereals, as well as feeds of animal origin, yeasts, potato protein, compound feeds with milk products, glutens, and products subjected to processes such as extrusion, flaking, and heating, yield significantly higher total fat contents when tested by procedure B than by procedure A. See Annex B.