Protein determination in animal feed using colorimetric titration
Protein determination in animal feed according to ISO 5983-2 and AOAC 2001.11 by digestion with Kjeldahl tablets and hydrogen peroxide followed by colorimetric titration using Optrode
A reliable and efficient method for the determination of total nitrogen and protein in animal feed according to ISO 5983-2 and AOAC 2001.11 is presented. The samples were digested using Kjeldahl tablets, hydrogen peroxide and the KjelDigester K-449. Distillation and boric acid titration were performed with the KjelMaster System K-375 / K-376 equipped with the colorimetric sensor Optrode. According to the norms, bromocresol green / methyl red mixed indicator was added to the boric acid for the automized colorimetric titration.
Register for download
Related Instruments
Similar Applications
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.