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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Instruments correspondants
Kjel Line
BUCHI’s latest steam distillation units are extremely accurate, ensure the sustainable use of resources and offer maximal safety during operation. The instruments have been designed to fit your individual needs and to enable the highest performance in the most convenient way.
SpeedDigester K-425 / K-436 / K-439
Set new standards for digestion speed, flexible use and result reproducibility with the IR SpeedDigester. Achieve higher sample throughput for nitrogen determination by Kjeldahl digestion and multiply functionality with this entry level IR digester.
