| 烘箱消解-镉铜还原法测定地表水中总氮 |
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| 引用本文： | 胡志军,谈俊,陈建秋.烘箱消解-镉铜还原法测定地表水中总氮[J].理化检验(化学分册),2012(5):540-542. |
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| 作者姓名： | 胡志军 谈俊 陈建秋 |
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| 作者单位： | 中国药科大学分析化学教研室;南京医科大学基础医学院 |
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| 基金项目： | 国家环保公益性行业科研专项(200809016);江苏省环境工程重点实验室开放基金(KF2009008) |
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| 摘 要： | 提出了烘箱消解-镉铜还原法测定地表水中总氮含量的方法。氮的浓度在7.637×10-4～1.375×10-2 mmol.L-1范围内与其吸光度呈线性关系,检出限(3S/N)为6.704×10-5 mmol.L-1。对人工海水、实验室自来水、海水和湖水中总氮进行测定,其回收率和相对标准偏差(n=6)分别在96.7%～101.3%和3.7%～3.9%之间。
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| 关 键 词： | 总氮 烘箱消解样品 镉铜还原法 |
Determination of Total Nitrogen in Surface Water by Oven Digestion-Cadmium Copper Reduction Method |
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| HU Zhi-jun,TAN Jun,CHEN Jian-qiu.Determination of Total Nitrogen in Surface Water by Oven Digestion-Cadmium Copper Reduction Method[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2012(5):540-542. |
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| Authors: | HU Zhi-jun TAN Jun CHEN Jian-qiu |
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| Institution: | 1(1.Teaching and Research Section of Analytical Chemistry,China University of Pharmacology,Nanjing 210009,China; 2.School of Basic Medicine,Nanjing Medical University,Nanjing 210029,China) |
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| Abstract: | A method for the determination of total nitrogen in surface water by cadmium-coper reduction method with sample digestion in oven was proposed.Linear relationship between values of absorbance and concentration of nitrogen was obtained in the range of 7.637×10-4-1.375×10-2mmol·L-1,with detection limit(3S/N) of 6.704× 10-5mmol·L-1.The proposed method was applied to the determination of total nitrogen in samples of artificial sea water,running water,sea water and lake water;test for recovery was made by standard addition method,giving values of recovery and RSD′s(n=6) in the ranges of 96.7%-101.3% and 3.7%-3.9% respectively. |
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| Keywords: | Total nitrogen Sample digestion in oven Cadmium-copper reduction method |
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