TKN determination in water and wastewater

SpeedDigester K-439, Kjel Line and MultiDist: Steam distillation and Potentiometric determination of Total Kjeldahl Nitrogen (TKN) according to the kjeldahl method in water and wastewater along with determination of Limit of Detection (LOD) and Limit of Quantification (LOQ).

An easy and reliable method for the determination of Total Kjeldahl Nitrogen (TKN) in water and wastewater, according to ISO 5663, DIN EN 25 663 and the methods listed in 40 CFR part 136.3, is introduced below. In this study, the limit of detection (LOD) and limit of quantification (LOQ) which is a measure of sentisivity of a method, were determined. To test the performance, nitrogen recovery in different concentrations of urea solutions was tested. The samples are digested using the SpeedDigester K-439 using Kjeldahl Tablets Titanium. A steam distillation protocol followed bya suitable boric acid titration is performed with the MultiKjel together with the Metrohm Eco Titrator. Coupling the new MultiKjel system and the Eco Titrator results in excellent performance with ease and speed of the analysis.