Application Note: Introducing a New ASTM Method for the Determination of Total Nitrogen, and TKN by Calculation, in Water Samples
8 June 2018

This whitepaper describes a new ASTM method for the determination of nitrogen levels in water samples using high temperature catalytic oxidation on a total organic carbon analyzer. ASTM D8083-16 is a new method for the determination of total nitrogen, and TKN by calculation, in water samples. The method compares favorably with the current EPA approved calculated total nitrogen in samples without interferences. ASTM D8083-16 saves laboratories time, uses less reagent and smaller sample volumes, and overcomes several known issues with current TKN and TN methods.