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Total Nitrogen - Combustion Method


This method quantitatively determines the total amount of nitrogen in liquid samples. The sample is injected by an autosampler into a high temperature (850ºC) combustion reactor with an oxidative catalyst, converting all forms of nitrogen to nitric oxide (NO). The NO is quantitated with a chemiluminescent detector. Samples should be homogeneous with particles smaller than 0.45 um. The method has a detection limit of 0.1 mg/L.

Sample amount requested:  50 mL
Questions concerning limited sample size can be answered by the UC Davis Analytical Laboratory.

Sample storage: samples should be stored at less than 6ºC.

American Society for Testing and Materials (ASTM International) Standards. Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection. Designation D 5176 – 91 (Reapproved 2003).