DIN EN ISO 5983-1-2005 动物饲料.氮含量的测定和粗蛋白质的计算.第1部分:基尔达斯法
Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005); English version of DIN EN ISO 5983-1
This part of ISO 5983 specifies a method for the determination of the nitrogen content of animal feeding stuffs
by the Kjeldahl process, and a method for the calculation of the crude protein content.
The method does not measure oxidized forms of nitrogen or heterocyclic nitrogen compounds.
This method does not distinguish between protein nitrogen and non-protein nitrogen. If it is important to
determine the content of non-protein nitrogen, an appropriate method should be used.