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浙江大学学报(理学版)  2017, Vol. 44 Issue (4): 480-484    DOI: 10.3785/j.issn.1008-9497.2017.04.014
化学     
双系统离子色谱法同时测定湖水中的氨氮和过硫酸根
戚荣平1,2, 周晓红2, 孟琪2, 桑娴2, 商晓春2, 郭伟强1
1. 浙江大学 化学系, 浙江 杭州 310027;
2. 杭州市下城区疾病预防控制中心, 浙江 杭州 310003
Simultaneous determination of ammonia nitrogen and peroxydisulfate in lake water by dual system ion chromatography
QI Rongping1,2, ZHOU Xiaohong2, MENG Qi2, SANG Xian2, SHANG Xiaochun2, GUO Weiqiang1
1. Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
2. Center for Disease Control and Prevention of Xiacheng District, Hangzhou 310003, China
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摘要: 研究过硫酸盐降解水体中氨氮等含氮化合物的能力,必须掌握能够同时监测水体中以氨氮为代表的含氮化合物以及过硫酸根含量的分析方法.建立了一种同时测定湖水中氨氮和过硫酸根的双系统离子色谱法.过硫酸根在一定的光、热、过渡金属离子条件下可分解水体中的氨氮.通过双系统离子色谱,分别以甲烷磺酸和氢氧化钾为淋洗液,抑制电导检测.结果表明:该方法氨氮检出限为0.005 mg·L-1,过硫酸根检出限为0.009 mg·L-1,相对标准偏差均小于1.78%,加标回收率为98.2%~103.5%,为环境实时监测提供了方便、快捷、有效的分析方法.
关键词: 双系统离子色谱氨氮过硫酸根同时测定    
Abstract: In order to study the ability of peroxydisulfate in degrading ammonia nitrogen and other nitrogen compounds in water, it is necessary to analyze the content of nitrogen compounds and peroxydisulfate in the water. Simultaneous determination of ammonia nitrogen and peroxydisulfate in lake water by dual system ion chromatography was proposed. Ammonia nitrogen could be decomposited by peroxydisulfate under the proper condition of light, heat and transition metal ions. KOH and MSA were used as eluent, and suppression conductivity detector was used for detection. The detection limits (LODs) of ammonia nitrogen and peroxydisulfate were 0.005 mg·L-1 and 0.009 mg·L-1, respectively, based on the signal-to-noise ratio of 3 (S/N=3) and the 25 μL injection volume. Relative standard deviations (RSDs) for retention time and peak area were all less than 1.78%. The easy and fast method was performed with satisfactory recoveries between 98.2% to 103.5% for all ions. It provides a convenient, rapid and effective analysis method for environmental monitoring.
Key words: dual system ion chromatography    ammonia nitrogen    peroxydisulfate    simultaneous determination
收稿日期: 2016-10-27 出版日期: 2017-12-09
CLC:  O657.7  
作者简介: 戚荣平(1977-),ORCID:http://orcid.org/0000-0002-3581-1466,男,学士,主任技师,主要从事理化检验研究,E-mail:363748275@qq.com.
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引用本文:

戚荣平, 周晓红, 孟琪, 桑娴, 商晓春, 郭伟强. 双系统离子色谱法同时测定湖水中的氨氮和过硫酸根[J]. 浙江大学学报(理学版), 2017, 44(4): 480-484.

QI Rongping, ZHOU Xiaohong, MENG Qi, SANG Xian, SHANG Xiaochun, GUO Weiqiang. Simultaneous determination of ammonia nitrogen and peroxydisulfate in lake water by dual system ion chromatography. Journal of ZheJIang University(Science Edition), 2017, 44(4): 480-484.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2017.04.014        https://www.zjujournals.com/sci/CN/Y2017/V44/I4/480

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