The characterization of total-nitrogen (TN) concentrations is an important component of many surface-water-quality programs. However, three widely used methods for the determination of total nitrogen?(1) derived from the alkaline-persulfate digestion of w
Rus, David L. dlrus@usgs.gov,Patton, Charles J. cjpatton@usgs.gov,Mueller, David K. mueller@usgs.gov,et al. Assessing total nitrogen in surface-water samples--precision and bias of analytical and computational methods. 2013-01-01.