流动注射法同时测定海水中氨氮和磷酸盐  

Simultaneous Determination of Ammonia Nitrogen and Phosphate in Seawater by Flow Injection Analysis

作　　者：朱敬萍[1] 胡红美[1] 张小军[1] 顾蓓乔[1] 陈瑜[1] 金雷[1] 

机构地区：[1]浙江省海洋水产研究所浙江省海洋渔业资源可持续利用技术研究重点实验室,舟山316021

出　　处：《理化检验（化学分册）》2015年第6期761-764,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：2012年度省重大科技成果专项计划项目(2012C13005);浙江省科技计划项目(2013F10065;2012F20026);国家海洋公益性行业专项(201005013);浙江省自然科学基金项目(LQ13C200004)

摘　　要：采用流动注射法同时测定海水中氨氮和磷酸盐的含量。在优化的试验条件下，氨氮和磷酸盐的线性范围分别为0．25mg·L-1和0．30mg·L-1以内，检出限（3S／N）分别为0．42μg·L-1和0．56μg·L-1。氨氮和磷酸盐加标回收率分别在85．0％～103％和86．7％～103％之间，测定值的相对标准偏差（n=6）分别在0．43％～5．3％和0～4．1％之间。方法用于分析标准物质，测定结果与分光光度法的结果一致。A method of flow injection analysis was used for simultaneous determination of ammonia nitrogen and phosphate in seawater. Under optimized conditions,the linear ranges of ammonia nitrogen and phosphate were found in the range within 0. 25 mg · L- 1and 0. 30 mg · L- 1,with detection limits（ 3S/N） of 0. 42 μg·L- 1and 0. 56 μg· L- 1,respectively. The recovery rates measured by standard addition method were in the ranges of 85. 0%- 103% and 86. 7%-103% for ammonia nitrogen and phosphate,respectively,with RSD were in the ranges of 0. 43%- 5. 3% and 0- 4. 1%,respectively. The method was used to analyze standard substance,giving results in agreement with those obtained by spectrophotometry.

关 键 词：流动注射法 氨氮 磷酸盐 海水 

分 类 号：O657.3[理学—分析化学]