Nitrogen Determination in Reference Substances
Operational Quality Check
In order to verify the BUCHI Digest System K-437 or the Digest Automat K-438 in combination with the KjelMaster K-375 with KjelSampler K-376, the nitrogen content of different reference substances is determined according to the classical Kjeldahl method. All recoveries of the samples should be within the specification of 98-102%.
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Nitrogen and Protein Determination in Animal Feed according to the Kjeldahl method
The determination of protein in feed is a routine procedure for quality assurance and labelling. A simple and fast method for protein determination in feed products according to the ISO 5983-2:2009 and AOAC 954.01 regulations is introduced below. The sample is digested with sulfuric acid and Kjeldahl Tablets Titanium using the digest Automat K-438, followed by distillation and titration with the KjelMaster K-375 with KjelSampler K-376.