| 紫外分光光度法测定硝酸盐氮时消除铁离子干扰的新方法 |
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| 引用本文： | 孙艳芝,李彩鹦,万平玉,李敏,陈咏梅.紫外分光光度法测定硝酸盐氮时消除铁离子干扰的新方法[J].光谱实验室,2011,28(6):3143-3147. |
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| 作者姓名： | 孙艳芝 李彩鹦 万平玉 李敏 陈咏梅 |
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| 作者单位： | 北京化工大学理学院 国家新危险化学品评估及事故鉴定基础研究实验室 北京市朝阳区北三环东路15号100029 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助 |
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| 摘 要： | 在未受有机物污染的体系中,采用吸光度校正法可以准确快捷的消除铁离子的干扰.铁离子在220nm和275nm处都有吸收,而且这两个吸光度之间具有A220,Fe3+=3.8A275,Fe3+的线性关系.利用硝酸根在275nm处没有吸收,将A220,Fe3+从水样在220nm的吸光度值中扣除后即得到水样中硝酸盐氮的浓度.
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| 关 键 词： | 硝酸盐氮 紫外分光光度法 铁离子 吸光度 |
New Method for Eliminating the Iron Ions Interference in the Determination of Nitrate by UV Spectrophotometry |
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| SUN Yan-Zhi,LI Cai-Ying,WAN Ping-Yu,LI Min,CHEN Yong-Mei.New Method for Eliminating the Iron Ions Interference in the Determination of Nitrate by UV Spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2011,28(6):3143-3147. |
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| Authors: | SUN Yan-Zhi LI Cai-Ying WAN Ping-Yu LI Min CHEN Yong-Mei |
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| Institution: | SUN Yan-Zhi LI Cai-Ying WAN Ping-Yu LI Min CHEN Yong-Mei(National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis,College of Science,Beijing University of Chemical Technology,Beijing 100029,P.R.China) |
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| Abstract: | The interference of iron ions in the absence of organic pollution can be eliminate accurately and efficient by absorbance correction method.The iron ion absorbed at both of 220nm and 275nm which had the linear relationship of A220,Fe3+=3.8A275,Fe3+.The concentration of nitrate nitrogen was determined by deducting the A220,Fe3+ from the absorbance value of water samples at 220nm due to that the nitrate did not absorb at 275nm. |
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| Keywords: | Nitrate Nitrogen UV Spectrophotometry Iron Ions Absorbance |
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