| 微波消解/流动注射光度法在线测定水中的总氮 |
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| 引用本文： | 苏苓,张海涛,王庆霞.微波消解/流动注射光度法在线测定水中的总氮[J].中国给水排水,2007,23(4):76-78. |
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| 作者姓名： | 苏苓 张海涛 王庆霞 |
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| 作者单位： | 徐州建筑职业技术学院,基础部,江苏,徐州,221008 |
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| 基金项目： | 江苏省高校自然科学基金;徐州建筑职业技术学院校科研和教改项目 |
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| 摘 要： | 利用微波在线消解水样，将流动注射分析技术与分光光度法相结合，建立了一种在线测定水中总氮的快速分析方法。在优化试验条件下，该方法对TN的检出限为0．04mg／L，对总氮含量为0．491mg／L的标准样品测定11次的相对标准偏差为1．2％。采用该方法测定河水、生活污水、工业废水水样中的TN含量，其相对标准偏差≤1％，加标回收率为97％～101％，结果令人满意。
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| 关 键 词： | 微波消解 流动注射 总氮 |
| 文章编号： | 1000-4602（2007）04-0076-03 |
| 修稿时间： | 2006-07-21 |
On-line Determination of Total Nitrogen in Water by Microwave Digestion and Flow Injection-spectrophotometry |
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| SU Ling,ZHANG Hai-tao,WANG Qing-xia.On-line Determination of Total Nitrogen in Water by Microwave Digestion and Flow Injection-spectrophotometry[J].China Water & Wastewater,2007,23(4):76-78. |
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| Authors: | SU Ling ZHANG Hai-tao WANG Qing-xia |
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| Affiliation: | Department of Foundation, Xuzhou Vocational College of Architectural Technology, Xuzhou 221008, China |
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| Abstract: | A rapid method for determination of total nitrogen in water by on-line microwave digestion and flow injection-spectrophotometry was established.Effects of concentration of reagents and other conditions were optimized.A detection limit of 0.04 mg/L total nitrogen is achieved.The relative standard deviation is 1.2% for the determination of a reference water sample of 0.491 mg/L total nitrogen(n=11).The proposed method is successfully applied to the analyses of several samples of river water,domestic wastewater and industrial wastewater,with relative standard deviations of less than 1.0% and recoveries of 97% to 101% by the standard addition method. |
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| Keywords: | microwave digestion flow injection total nitrogen |
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