855
855 TOTAL NITROGEN BY COMBUSTION
Summary: 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.
The method requires 8 mL of sample, but 50 mL is requested for quality control purposes.