9Halstead J A, Edwards J, Reginald J, et al. Potential forehlorate in- terference in ion chromatographic determination of total nitrogen natural waters following alkaline persulfate digestion [ J ]. J. Chromatogr. A,1999, 857: 337-342.
10Brian M.De Borba, Richard F.Jaek, Jeffrey S. Rohrer, et.al. Simulta- neous determination of total nitrogen and total phosphorus in environ- mental waters using alkaline persulfate digestion and ion chromatography [J].J. Chromatogr. A, 2014, 1369: 131-137.