| 依文思蓝褪色光度法测定亚硝酸根 |
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| 引用本文： | 席晓岚,徐红,季宇飞.依文思蓝褪色光度法测定亚硝酸根[J].化学世界,2008,49(3):151-153. |
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| 作者姓名： | 席晓岚 徐红 季宇飞 |
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| 摘 要： | 研究亚硝酸根与依文思蓝的褪色反应,建立一个简单、灵敏、选择性高的亚硝酸根的测定方法。采用紫外分光光度法测定不同条件下的吸光度。实验表明,当依文思蓝与NO2-反应后发生颜色变化,在615 nm波长处发生褪色反应,此波长处,吸光度的变化与溶液中NO2-的浓度成正比,其线性范围在0~20μg/25 mL,摩尔吸光系数为ε=1.4×104L/(mol.cm),相关系数为0.9995。方法具有良好的稳定性和选择性;建立了测定亚硝酸根的新方法;用于环境水样中微量NO2-的测定,结果满意。
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| 关 键 词： | 亚硝酸根 依文思蓝 分光光度法 |
| 文章编号： | 0367-6358(2008)03-151-03 |
| 修稿时间： | 2007年9月7日 |
Spectrophotometric Determination of Trace Nitrite with Evans Blue |
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| XI Xiao-lan,XU Hong,JI Yu-fei.Spectrophotometric Determination of Trace Nitrite with Evans Blue[J].Chemical World,2008,49(3):151-153. |
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| Authors: | XI Xiao-lan XU Hong JI Yu-fei |
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| Abstract: | Spectrophotometric method was used for the determination of trace nitrite in UV-vis by reaction with evans blue.The linear range for the determination is 0~20 μg/25 mL NO~-_2.The molar absorptivity of the method ε is 1.4×10~4 L/(mol·cm).Most of coexistent ions do not interfere the determination of NO~-_2,and the selectivity of the method is good.The method has been applied to the determination of nitrite samples with satisfactory results. |
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| Keywords: | nitrite evans blue spectrophotometry |
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