| 引用本文: | 黎文,白英臣,王立英,王静,傅平青,廖海清,吴丰昌,刘丛强.淡水湖泊水体中溶解有机氮测定方法的对比.湖泊科学,2006,18(1):63-68. DOI:10.18307/2006.0109 |
| LI Wen,BAI Yingcheng,WANG Liying,WANG Jing,FU Pingqing,LIAO Haiqing,WU Fengchang,LIU Congqiang.Determination of Dissolved Organic Nitrogen in fresh lake water: method comparison. J. Lake Sci.2006,18(1):63-68. DOI:10.18307/2006.0109 |
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| 淡水湖泊水体中溶解有机氮测定方法的对比 |
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黎文1,2, 白英臣1,2, 王立英1,2, 王静1,2, 傅平青1,2, 廖海清1,2, 吴丰昌1, 刘丛强1
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1.中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002;2.中国科学院研究生院, 北京 100039
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| 摘要: |
| 溶解有机氮(Dissolved Organic Nitrogen,DON)是天然水体中氮的重要组成部分,目前研究相对很少．本文对淡水中测定DON的两种常见方法即过硫酸钾湿氧化法(Persulfate Oxidation,PO)和高温催化氧化法(High Temperature Cata-lytic Oxidation,HTCO)进行了对比研究．结果表明:两种方法各有特点,湿氧化法相对较为理想．湿氧化法对不同氮标准化合物的回收率较高,平均为96.0±3.0%以上(杂环氮化合物除外);对湖泊淡水样品,用PO法测定溶解有机氮的相对标准偏差范围为6.2%-12.5%．高温催化氧化法对不同氮标准化合物的回收率较低,平均为68.4±13.6%,需作进一步条件优化． |
| 关键词: 溶解有机物 溶解有机氮 湿氧化 高温催化氧化 淡水湖泊 |
| DOI：10.18307/2006.0109 |
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| 基金项目:国家重点基础发展规划研究项目(2002CB412300);国家自然科学杰出青年基金项目(40525011);青年基金项目(40403011)联合资助 |
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| Determination of Dissolved Organic Nitrogen in fresh lake water: method comparison |
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LI Wen1,2, BAI Yingcheng1,2, WANG Liying1,2, WANG Jing1,2, FU Pingqing1,2, LIAO Haiqing1,2, WU Fengchang1, LIU Congqiang1
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1.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, P. R. China;2.Graduate School, Chinese Academy of Sciences, Beijing, 100039, P. R. China
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| Abstract: |
| Dissolved organic nitrogen is an important component of dissolved organic matter in natural aquatic system. But little is known about its characteristics. This study compared two common methods for DON analysis; persulfate oxidation(PO) and high temperature catalytic oxidation(HTCO). The results showed that both methods had their own merits,but better results were obtained using PO method. PO method resulted in higher recovery for various nitrogen-containing standard compounds(96.0 ±3.0%, excluding heteroyclic nitrogen compounds),and relative standard deviation ranged from 6.2% to 12.5% . The HTCO method yielded relatively low recovery(68.4±13.6%), and needed further impovement. This study would be helpful for the study of nitrogen biogeochemical cycling in aquatic environment. |
| Key words: Dissolved organic matter dissolved organic nitrogen wet oxidation high temperature catalytic oxidation freshwater lake |
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