BS 5766-15:1997 Methods for analysis of animal feeding stuffs. Determination of soluble nitrogen content after treatment with pepsin in dilute hydrochloric acid
Does not distinguish between protein nitrogen and non-protein nitrogen.
BS 5766-15:1997 history
1997BS 5766-15:1997 Methods for analysis of animal feeding stuffs. Determination of soluble nitrogen content after treatment with pepsin in dilute hydrochloric acid