H Wien Nie, Vu Thi Hao, Tran Thi Hoai, Mai Gia Thao, Bui Cong Gia Bao, Nguyen Khac Manh and Thai Tien Dung 2022. Determination of total nitrogen and phosphorus in soil by ion chromatography with conductivity detector following persulfate digestion method . Journal of Military Science and Technology. FEE (Dec. 2022), 272–278. DOI:https://doi.org/10.54939/1859-1043.j.mst.FEE.2022.272-278.