Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001); German version EN ISO 8968-5:2001— 12 стр.
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) (ISO/DIS 8968-4:2013); German version prEN ISO 8968-4:2013
Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014); German version EN ISO 8968-1:2014— 26 стр.
Animal feeding stuff, cereals and milled cereal products - Guidelines for the application of near infrared spectrometry (ISO 12099:2010); German version EN ISO 12099:2010— 40 стр.