Total Kjeldahl Nitrogen determination in wastewater
SpeedDigester K-439, MultiKjel and MultiDist: Steam distillation and colorimetric titration for Total Kjeldahl Nitrogen determination in wastewater samples
Nitrogen in water and wastewater can be found in several forms, organic and inorganic. A wastewater treatment plant removes different nitrogen sources until the regulatory standards are met. Therefore, the determination of Total Kjeldahl Nitrogen (TKN) is of great importance. In this application note, an easy and reliable method for the determination of TKN in wastewater is introduced: Samples are digested with the SpeedDigester K-439 using Kjeldahl tablets Titanium. A steam distillation protocol followed by a colorimetric titration in boric acid is performed with the MultiKjel and Metrohm Eco Titrator, respectively, in accordance with ISO 5663 [1], DIN EN 25 663 [2] and the methods listed in 40 CFR part 136.3.
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