DIN EN ISO 16634-1-2009 食品 根据Dumas原理的燃烧和粗蛋白含量的计算测定总氮含量 第1部分:含油种子和牲畜饲料
Food products - Determination of the total nitrogen content by combustion according to the Dumas principle and calculation of the crude protein content - Part 1: Oilseeds and animal feeding stuffs (ISO 16634-1:2008); English version of DIN EN ISO 16634-1:
This part of ISO 16634 specifies a method for the determination of the total nitrogen content and the
calculation of crude protein content of oilseeds and animal feeding stuffs.
This method, like the Kjeldahl method, does not distinguish between protein nitrogen and non-protein nitrogen.
For the calculation of protein content, various conversion factors are used (see Annex D).
This method is not applicable to milk and milk products, for which a method is specified in
ISO 14891 I IDF 185.