BÜCHI Labortechnik AG

TKN determination in water and waste water


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Determination of TKN (Total Kjeldahl Nitrogen) in Water and Waste Water according to the Kjeldahl Method.

The determination of TKN in water and waste water is a routine procedure for quality assurance. A simple and fast procedure for the TKN determination in water, according to ISO 5663, AOAC 973.48 and EPA 351.3, is introduced below. The sample is digested with sulfuric acid and the Kjeldahl tablet titanium using the BUCHI KjelDigester K-449. followed by distillation and titration with the KjelMaster system K-375/K-376.

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