A sodium hypobromite oxidation-sulfamic acid reduction method for determination of 15$ {\bf{NH_4^+}}$ in 15N enrichment sediment slurry incubation samples
1. Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2. Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
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