标准摘要
[中文适用范围]： 本国际标准规定了根据Hagberg-Perten法测定谷物α-淀粉酶活性的落数（FN）方法。该方法适用于谷物颗粒，特别是小麦和黑麦及其面粉、硬质小麦及其粗粒。该方法不适用于测定低水平的α-淀粉酶活性。通过将FN转换为液化数（LN），可以使用该方法估算具有已知FN的谷物、面粉或粗粒混合物，以生产出具有所需FN的样品。 [外文原描述]： ISO 3092:2009 specifies the determination of the alpha-amylase activity of cereals by the falling number (FN) method according to Hagberg-Perten. This method is applicable to cereal grains, in particular to wheat and rye and their flours, durum wheat and its semolina. This method is not applicable to the determination of low levels of alpha-amylase activity. By converting the FN into a liquefaction number (LN), it is possible to use this method to estimate the composition of mixtures of grain, flour or semolina with known FNs necessary to produce a sample of a required FN.
英文名称Wheat, rye and their flours, durum wheat and durum wheat semolina — Determination of the falling number according to Hagberg-Perten