DANSK DS/EN ISO 8968-4:2016 乳和乳制品 氮含量的測定 第4部分:蛋白質和非蛋白質氮含量的測定及真實蛋白質含量計算(參考方法)
Milk and milk products – Determination of nitrogen content – Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)