| 甲基橙亚硝化极谱法测定亚硝酸根 |
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| 引用本文： | 李建平,屈优优,魏小平. 甲基橙亚硝化极谱法测定亚硝酸根[J]. 分析试验室, 2001, 20(3): 60-62 |
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| 作者姓名： | 李建平 屈优优 魏小平 |
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| 作者单位： | 1. 桂林工学院应用化学系,
2. 广西地质环境监测总站, |
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| 摘 要： | 研究了甲基橙亚硝化产物的极谱波行为 ,提出了亚硝化极谱法测定亚硝酸根的灵敏极谱波新体系。在 0 .6mol/L 盐酸中 ,甲基橙与 NO-2 的亚硝化反应产物在极谱仪上于 - 0 .31 V( vs.SCE)可获得灵敏的极谱波。导数波高与亚硝酸根浓度在 1 .0 9× 1 0 -7～ 1 .0 9× 1 0 -5mol/L范围内成正比 ,检出限为 6.52× 1 0 -8mol/L。研究了极谱波行为及反应机理。并利用该法测定了水样中的亚硝酸根
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| 关 键 词： | 亚硝酸根 极谱法 甲基橙 亚硝化 水质分析 |
| 文章编号： | 1000-0720(2001)03-0060-03 |
Determination of trace amount nitrite by polarography based on its nitrosation reaction with methyl orange |
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| LI Jian-ping,QU You-you,WEI Xiao-ping. Determination of trace amount nitrite by polarography based on its nitrosation reaction with methyl orange[J]. Chinese Journal of Analysis Laboratory, 2001, 20(3): 60-62 |
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| Authors: | LI Jian-ping QU You-you WEI Xiao-ping |
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| Abstract: | In 0.6 mol/L HCl, nitrite can react with methyl orange. The nitrosation product can produce a sensitive polarographic wave at -0.31V. The derivative wave height is linear with the concentration of nitrite in the range of 1.09×10-7～1.09×10-5mol/L with detection limit of 6.52×10-8 mol/L. The polarographic behavior of the wave was studied and the wave was proved to be absorptive wave.The method was used to determination of nitrite in natural water with satisfactory results. |
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| Keywords: | Nitrite Polarography Methyl Orange Nitrosation |
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