標準號：ISO 17997-2-2004
中文標準名稱：牛奶.酪蛋白-氮含量的測定.第2部分:直接法
英文標準名稱：Milk - Determination of casein-nitrogen content - Part 2: Direct method
標準類型：X16
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：X16
國際標準分類號：67.100.10
適用范圍：This part of ISO 17997 | IDF 29 specifies a routine method for the direct determination of the casein-nitrogen content of bovine milk. The method can be modified for milk from other species or liquid dairy products. NOTE Casein nitrogen will decrease with milk storage time due to casein breakdown even at 4 ℃. The casein nitrogen of heat-treated milk will be artificially high because of whey-protein denaturation.