标准编号：ISO 20483:2013
中文名称：谷物和豆类 含氮量的测定和天然蛋白质含量的计算 凯氏法
英文名称：Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method
发布日期：2013-12
标准范围
This International Standard 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. If it is important to determine the non-protein nitrogen content, an appropriate method would be applied.NOTE In certain cases, full recovery of the nitrogen in nitrates and nitrites is not possible by this method.
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