标准摘要
[中文适用范围]: 本标准规定了凯氏定氮法测定谷物、豆类及其制品中氮含量的方法,以及粗蛋白含量的计算方法。 该方法不区分蛋白质氮和非蛋白质氮。 如果确定非蛋白质氮含量很重要,则应采用适当的方法。 注:在某些情况下,通过此方法不可能完全回收硝酸盐和亚硝酸盐中的氮。 [外文原描述]: ISO 20483:2013 specifies a method for the determination of the nitrogen content of cereals, pulses and derived products, according to the Kjeldahl method, and a method for calculating the crude protein content. The method does not distinguish between protein nitrogen and non-protein nitrogen.
英文名称Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method