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Status : Withdrawn
Standard Type : Main
Document No : ISO 5983-2:2005
Document Year : 2005
Pages : 14
Edition : 1
Section Volume : Animal feeding stuffs (ISO/TC 34/SC 10.)
It concerns a semi-micro rapid routine method using block-digestion, copper catalyst and steam distillation into boric acid.
The method is applicable to the determination of greater than 0,5 % Kjeldahl nitrogen in animal feeding stuffs, pet foods and their raw materials.
The method does not measure oxidized forms of nitrogen nor heterocyclic nitrogen compounds. The method does not distinguish between protein nitrogen and non-protein nitrogen.