岩矿测试2011，Vol.30Issue(5)：550-554,5.
盐酸浸取-次溴酸盐氧化法测定海洋沉积物中的氨氮
Determination of Ammonia-Nitrogen in Marine Sediments by Hypo-bromate Oxidation with Hydrochloric Acid Extraction
摘要
Abstract
Ammonia-N is one of the important compositions of marine sediment and the most active component at the sediment-water interface. The routine method uses NaCl, MgCl or KCl and other neutral solvents as extractants. However, only part of ammonia-N in sediments can be determined by this method. A new method to determine ammonia-N in sediment is presented in this paper. Ammonia-N in sediment was extracted by the 0.1 mol/L HC1, then determined by hypo-bromate oxidation. Based on a large number of experiments, the optimal measurement conditions were selected, which included hypo-bromic acid concentration, NaOH concentration in hypo-bromic acid solution, acidity for chromogenic reaction and dosage for sulfanilamide. Almost all of the ammonia-N in marine sediments can be extracted by this new method with better precision and accuracy than alternative methods.关键词
氨氮/海洋沉积物/盐酸浸取/次溴酸盐氧化法Key words
ammonia-nitrogen/marine sediments/hydrochloric acid extraction/hypobromite oxidation method引用本文复制引用
李学刚,宋金明,袁华茂,李宁..盐酸浸取-次溴酸盐氧化法测定海洋沉积物中的氨氮[J].岩矿测试,2011,30(5):550-554,5.基金项目
海洋沉积与环境地质国家海洋局重点实验室开放基金(MASEG200606) （MASEG200606）
国家基金委"创新研究群体科学基金"(40821004) （40821004）
国家重点基础研究发展计划(973计划)项目(2007CB407305) （973计划）
